Malicious PDF — malware analysis report

Static analysis result for SHA-256 107037da83486d3d…

MALICIOUS

PDF

80.1 KB Created: 2021-09-16 03:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8f89e3c2a08ccc24120b04605d5446e4 SHA-1: f1ff6709a49757a77f0f831d4432f2993aadee2b SHA-256: 107037da83486d3d555f439a924decef4eb9f651bc5ea7327204ea3f4efdb669
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits multiple indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. The presence of a 'Password-protected archive handoff' heuristic suggests the document's primary purpose is to trick users into downloading an archive, likely containing malware, by providing a password. The numerous embedded URLs pointing to disposable hosting and compromised CMS uploads further support a phishing or credential harvesting scheme, potentially leading to the execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/uplcv?utm_term=telecharger+jeux+gratuit+apk PDF link annotation
    • http://sweepinstyle.com/userfiles/file/77845171178.pdfIn PDF document text
    • http://factorycontrolprojects.com/userfiles/file/10321932638.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/divemoxapegujiritisode.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613743395032b---kapitolapegupolebum.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/91241540484.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/38364810733.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/8440238463.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021913241338693.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/61070894660.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/16233749204.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141d2ad0e16e---gatebofidipazikiguxanazus.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16135e10fa0dc0---94936875344.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/86028094492.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/jovukolopekunevevezedapo.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/67414398427.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/30397300974.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/guneziwakukepuk.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/fodoxabewivixena.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021910131482876.pdfIn PDF document text
    • https://tele-video.ru/upload/files/munotexopelidegaj.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/55940300182.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/riwerijijes.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/14545460459.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/68810401386.pdfIn PDF document text
    • https://arbormaster.us/uploads/files/xopuwajusadokinudomo.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7552f5ff2e6d2c66d5b423e3fb77c82c/13907798367.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C8 18492 bytes
SHA-256: 0e871f298d0eed205c63f216bcae6dd7bb597af2e24b3c233d8d7be392ef6e9e
font_01_sfnt_off0001020b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A22 10648 bytes
SHA-256: 831582527e97e62856d0660562ba5efa4d44af29603a5b4f2c361ab6e8a1a0af

Open this report in the interactive analyzer, or submit your own file for analysis.