Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1de614edc58053…

MALICIOUS

PDF

81.8 KB Created: 2021-09-07 08:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 891ea3756e502ea82d9b969018b8199e SHA-1: 5226e068f1f56c6b3ef26a1136ac96257f0526e7 SHA-256: bf1de614edc5805322e86758c04fd2d8f0ca2fcd92a7f9df32ef559d9af1f5e5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's primary purpose is to act as a link farm, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the extensive use of external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=kia+sportage+2011+radio+manual PDF link annotation
    • http://ifaistos.reality.gr/~triantaf/images/file/71280962175.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/serotubiwiretofab.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/b8428711f599ca5b346fe8202e0d15f8/24188628178.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/xebebizazaxilamobewodazaj.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021082208280073499.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/46332048559.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/22377397832.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/10619832868.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608615fc623db---59803149125.pdfPDF link annotation
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/6439ea936d6c6fb0c7bf00aa9428cfc7/rozolilejimodol.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/399ebc76565e42739c0b5f03c9184983/46825544093.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/7b0eea42317a7f89f371b1abe43bd458/bosexipe.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/36764392399.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118d4ccb610d---23601798769.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/23190675379.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/jafunotewubupurenaxasoto.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/nozipisesojojegexuja.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/49812944916.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/415348937.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/52030281069.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/fb27a2ec39dcac5438f4f986d9a4c093/zosepogukemuviluweludezar.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/80312539575.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853ccc88628---8442492632.pdfIn PDF document text
    • http://chpcentre.com/files/file/68318983653.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_off0000d7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 18280 bytes
SHA-256: 629d8c8f10536054c29911a048e958b6b05c8b308aedc16bef33854544d9aeb7
font_02_sfnt_off00011f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7A 11120 bytes
SHA-256: 84b5a856eb72725ca35331029a5a937f1e58666181b8e7f259e95e0c8e983ab6

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