Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc6477f376dfacb…

MALICIOUS

PDF

118.8 KB Created: 2020-11-13 09:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d000b051b3f124e99c22f7d865f7f9b6 SHA-1: de51cfbe54ed7512c59a3f3853b111c84bb6ab09 SHA-256: abc6477f376dfacb3c50710404c604951cde488e016cdad913cbf38d052fa3f4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/123?utm_term=minecraft+pe+12.0+apk+download+1.1.0.9 PDF link annotation
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/15002342.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/jorud_jatewedebufobug_zuvokivaxagulek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f8758b34696b.pdfIn PDF document text
    • https://wisizexabebaj.weebly.com/uploads/1/3/4/4/134461468/10b0350f.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/bumumobo.pdfIn PDF document text
    • https://rilebowiteb.weebly.com/uploads/1/3/3/9/133986594/guwune-xowomixa-vogumomu.pdfIn PDF document text
    • https://dowazulipogopu.weebly.com/uploads/1/3/4/3/134322731/liduxinogemine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_5f95caa56deb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_5f8f6a908d849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f8bf191dfbf4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jumedemimo/kixorurireguk.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/83781738741.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/jepifotunuvom.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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17017 5436 bytes
SHA-256: 2ec38096a030bba6d1863db2bb2c2634bbbe8627b32b5d597b41044440eed391
font_01_sfnt_off000182b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182B0 9088 bytes
SHA-256: 4d5a2cba9d1172a90ac5d9a4e5436380600010b9dde6309fc34fb2ba2e38a855
font_02_sfnt_off00019bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BCC 10884 bytes
SHA-256: 443f414957006c92ed482790e9d79f42cfbc803a66eed4f99b6f63b6ffcf933f
font_03_sfnt_off0001bf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF71 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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