Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b743aa7af8b431…

MALICIOUS

PDF

87.5 KB Created: 2021-04-05 03:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cd3b950c1f87e770f2997b2179ab6aea SHA-1: b648fc31563f3e5899f966129b94632a894df643 SHA-256: 60b743aa7af8b431ef45d2beb5cd24dd0225c87503a278acce60144ba068dc43
206 Risk Score

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. It uses a callback-phone (TOAD) lure. 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 0.9997

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/award?keyword=weight+and+balance+sheet+cessna+172+pdf PDF link annotation
    • http://samekado.22web.org/furniture_memory_game.pdfIn PDF document text
    • https://jajixawu.weebly.com/uploads/1/3/5/9/135992574/1842676.pdfIn PDF document text
    • https://punujagenak.weebly.com/uploads/1/3/0/7/130775029/dca1bb606f15369.pdfIn PDF document text
    • https://savibivo.weebly.com/uploads/1/3/1/3/131381036/bikufikivobaxazalo.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/91710098668.pdfIn PDF document text
    • http://nosumiva.mywebcommunity.org/kuzigesoramefena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_aa7ea7bc85b5406faf13bb0eaee2e702.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voxulija/does_a_guardian_ad_litem_drug_test.pdfIn PDF document text
    • http://zelagipu.rf.gd/datogotufufoti.pdfIn PDF document text
    • http://wexorasojovi.epizy.com/lurolubiwamamofusegox.pdfIn PDF document text
    • http://jepevam.rf.gd/active_listening_training.pdfIn PDF document text
    • http://rikovinob.epizy.com/dr_martin_luther_king_jr_letter_from_birmingham_jail_summary.pdfIn PDF document text
    • http://lezenexujurab.epizy.com/laars_neotherm_boiler_troubleshooting.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_d1fcad00fa83400abeaa7427435a1e7b.pdf?index=trueIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_0b9c529b55044483b71a53670c987a9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/72943551253.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/15417281037.pdfIn PDF document text
    • http://dusuvoparujizoj.rf.gd/10821685735.pdfIn PDF document text
    • http://dijorud.epizy.com/normal_heart_rate_chart.pdfIn PDF document text
    • http://xifebudi.epizy.com/99522365413.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11426 5736 bytes
SHA-256: 79e4844f563a3419774bb8ceb3319614f5358eb34dc1542c25af2b66c271d5a6
font_01_sfnt_off000127cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CD 11884 bytes
SHA-256: 905567e6bcc0d62a3283c016b652bdf1940d3d5c83408754f135d8fb8b89010f

Open this report in the interactive analyzer, or submit your own file for analysis.