Malicious PDF — malware analysis report

Static analysis result for SHA-256 047058e604d04f3d…

MALICIOUS

PDF

73.4 KB Created: 2021-09-04 10:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c87182b65bd658a7adb1343d319af0f3 SHA-1: 9828ac37260d5ec9f77aad7ac4c280034ffc1594 SHA-256: 047058e604d04f3dd11755b2e78a6b1beb8815db72fadc9588fb09b58956de73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs, many of which point to compromised or disposable domains, suggesting an attempt to lure users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a pattern of using such domains for link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/44298846609.pdf In PDF document text
    • http://szentdorottyapatika.hu/files/rirotamimojudavasewer.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/c4380b7d30754eb04eb327c0598aa637/50350255128.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77b4a6d5de---xevivelinumafenejuxibazu.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/97843457139.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/zexasapufezeladezumokow.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b3c8906c1f7---somasijanufoxutilurifeji.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1600f5ae49---xudukisonajuji.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/vazumowuken.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/26debfd1398717abfc510b43786f70ce/fimanulitiberotajixovaram.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/33522949736.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/xutebotonogar.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e1703cddd---bifofuxoruvoteku.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a5ba89dc---99323609983.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/gulujatixulutunivot.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/92254722378.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/748rrbht21sums54r8h422cu71/51032329898.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/e31590b087668a921b9dec1c14a2378a/93673613872.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/f6ac1b37b47bcd048e3a835900f9ff5a/97264453815.pdfIn PDF document text
    • https://dcimx.com/files/74432861384.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b6efa59b4---lonemerukevurig.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16091f2dc34993---fomebomusexubifefixivizem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=introduction+to+optics+pedrotti+pdfPDF link annotation
    • 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_off0000be39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 10456 bytes
SHA-256: 199c37d2a6ffda46b4cbb1cc5a84d50c91430508fc93595cb3ea6b311d49d77f
font_02_sfnt_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 16560 bytes
SHA-256: bb6e4e61e83f1ed0ce83d7a85e5fdd63c1fedf43643a388a8ae1f8087d5b9f4a

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