Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1fba0e8903e552…

MALICIOUS

PDF

78.4 KB Created: 2021-03-21 09:18:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 715788a215914dbf8db8a41dfad7b3db SHA-1: 21c35d3613aa74962b8848d496781620e6c4a90f SHA-256: 8a1fba0e8903e5528c15b769ef6f82b293b585c35b22ffc9ec92d60f50668cdf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One prominent URL, 'https://xezojetit.ru/123?utm_term=super+toss+the+turtle+mod+apk+latest', is directly embedded and likely serves as a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://xezojetit.ru/123?utm_term=super+toss+the+turtle+mod+apk+latest PDF link annotation
    • https://ratowoxure.weebly.com/uploads/1/3/4/5/134584599/xuxezuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410216/normal_5fc7ca4d3f221.pdfIn PDF document text
    • https://tetalopen.weebly.com/uploads/1/3/1/8/131857308/bafevojig.pdfIn PDF document text
    • https://jitipukojid.weebly.com/uploads/1/3/4/7/134707402/76473e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_6013bc8592851.pdfIn PDF document text
    • https://javodezupaxut.weebly.com/uploads/1/3/1/3/131380273/felonawaketum.pdfIn PDF document text
    • https://faraxebeg.weebly.com/uploads/1/3/4/4/134475962/b0eb0.pdfIn PDF document text
    • http://rgtuitp.ru/jesasiwikufeludokilofatajx6o2j.pdfIn PDF document text
    • http://girlsbeach.space/buwuwucc91v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5fd8b8346b634.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/gazebonazijukore.pdfIn PDF document text
    • https://sizosunobefema.weebly.com/uploads/1/3/1/4/131453016/5375825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454556/normal_602169cdb5685.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382949/normal_6004f53625a22.pdfIn PDF document text
    • https://dilomosef.weebly.com/uploads/1/3/4/3/134316650/8716200.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/25191406200.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/35265669719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e439b18-92f6-4d14-9220-4b2f231a1cd6/turaxujiwovivexedubava.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/posokadojegufefijexetuzew.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/fafovonezeniviruwojar.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/24294616755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f18ea59-b49f-4f85-a341-6ff88e2c90d1/ipod_nano_7th_generation_specs_gsmarena.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_off0000f3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CE 5364 bytes
SHA-256: cbfcd07fa70596953a2cbe2237a08ba3244218ecb0f94bddb0f4251a539bc645
font_01_sfnt_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 11388 bytes
SHA-256: 25f29f3ffb4d12c02b157c8934ff5fe4eb8d5b06293f1aaeb4a029945aadb6aa

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