Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9c9ff89c4f1726…

MALICIOUS

PDF

87.3 KB Created: 2021-03-14 02:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1984f50cae7ca4fc7de0597d48fd9957 SHA-1: 35cd56e95defcf16bdf6974011a686103fc00f19 SHA-256: ae9c9ff89c4f172613826c5d7e2b8094650057c7832ce3cd05a719c4299fc852
126 Risk Score

Malware Insights

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

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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=jetpack+joyride+apk+download+ios PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370746/normal_5fe2c0b1623b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5fd2a39da2b95.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/dZjagfw/59634875030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_6035eaf03bdcf.pdfIn PDF document text
    • https://ginekimef.weebly.com/uploads/1/3/0/7/130738874/nulikuw.pdfIn PDF document text
    • http://card2card.live/97434386384mfb78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ffb2012a3a81.pdfIn PDF document text
    • http://gordei2d.com/3474051695889q7w.pdfIn PDF document text
    • http://legendnat.space/33321968602zr4sv.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/jokofuru.pdfIn PDF document text
    • http://milano-moda.space/yen_endral_un_piranthanal_song_mp3_downloadngxz0.pdfIn PDF document text
    • https://safapovajedetux.weebly.com/uploads/1/3/4/6/134642125/nizufip-bovakulejufe.pdfIn PDF document text
    • https://tobivuzulukimu.weebly.com/uploads/1/3/1/3/131384599/kesubax.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/jci1s2X/sewazabebufofokulujimosa.pdfIn PDF document text
    • https://tositoda.weebly.com/uploads/1/3/5/3/135312816/moletudilidu.pdfIn PDF document text
    • http://austritkfa.com/honeywell_7-day_programmable_light_switch_timer_white_rpls530a1038_ubjnb6.pdfIn PDF document text
    • https://gujuxufun.weebly.com/uploads/1/3/5/3/135398829/ea786968bdc5ad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5fd0c25991f1e.pdfIn PDF document text
    • https://cdn.sqhk.co/xaduwudixum/4Nhdaig/alibaba_apk_mirror.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8c806265-8291-4c32-b7da-49be25f5b4e8/tilotapirimeliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eada8da-9dd5-4a78-b24e-d0aa89574167/what_is_the_best_graphic_design_app.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 2960 bytes
SHA-256: 495dc75d95a6a6f45ac0640accda880cdd7226211fb355277ff836c691f61857
font_01_sfnt_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 5176 bytes
SHA-256: fbcfb67425e12b893b62df310c835671a4d833ba73f749691fd11173d61cbd43
font_02_sfnt_off000119ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EE 11544 bytes
SHA-256: dc480874115e6b06bed39db22740e1c2469856639b641c0eff583ba85570141e
font_03_sfnt_off00014135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14135 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71