Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6d814cb417f123…

MALICIOUS

PDF

79.7 KB Created: 2021-03-17 17:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac0e955bcbc830d9b7c664f9abe217f7 SHA-1: 1342b6e6e4f3d6b5fde2c0d520477ab8ed53dbcc SHA-256: 7e6d814cb417f123c042d295fb4d62df04090165994ff9c7e3778f831d34048d
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of a link farm designed to attract traffic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/wix?keyword=fpse+for+android+apk+here
    • http://moresukko.ru/losing_yourself_eminem_lyricsd6j7s.pdf
    • https://gubelowilesatu.weebly.com/uploads/1/3/0/7/130739845/boxeji.pdf
    • http://markettop.pro/games_2018_carwairn.pdf
    • https://kevosenebiv.weebly.com/uploads/1/3/1/8/131871602/555650.pdf
    • https://kalokawagubur.weebly.com/uploads/1/3/1/3/131398574/dudufanera.pdf
    • https://zetakopazo.weebly.com/uploads/1/3/5/3/135351561/8c89a5b.pdf
    • http://nefritthebestthing.site/positive_action_bible_curriculum_route_668wf9i.pdf
    • http://xajoraxi.22web.org/curtain_measuring_guide_width.pdf
    • https://cdn.sqhk.co/duzupafuj/iicLhav/62319391252.pdf
    • http://metazoaapc.fun/divina_commedia_canto_7_inferno_testos0v6q.pdf
    • https://cdn.sqhk.co/jisaside/jcfUgcA/84498084351.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sejokuze.rf.gd/in_praise_of_shadows.pdf
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_8f49d525545342fe803d53d9afebadac.pdf?index=true
    • http://rajiwewovipu.epizy.com/91642057079.pdf
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_50656cd519b94b76af44f4600c8e79f2.pdf?index=true
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_3e86225b21f74d178ea16e25151f4f3f.pdf?index=true
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_985686bdd6f64e179dd16b9e525cf98a.pdf?index=true
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_1627f2088b0840e58adfc7887a7fa428.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ba.bin
ca82112c527dfed5c1064a6aab15127825016978ea6197f43cc541680cfa0a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BA 5116 bytes
font_01_sfnt_off0001081f.bin
bfcd8b539875e50ed8f45e4254dae930bdc704dc6f09071609e92ae11564965e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 12236 bytes

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