Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c768e5772490c03…

MALICIOUS

PDF

69.3 KB Created: 2021-01-21 16:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cc429775f22c1da040801e45c3efd3b8 SHA-1: efa935db2aa5b377652722c537845163a8b981ac SHA-256: 2c768e5772490c03ab8354b495a692710d7fd0741cc3e512325528aa42293fe3
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting or redirector infrastructure, indicating a link farm designed to distribute malware or phish users. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=phonics+practice+book+grade+2+pdf In PDF document text
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/9222429.pdfIn PDF document text
    • https://vobilazi.weebly.com/uploads/1/3/5/3/135300702/4f29dd0283f54.pdfIn PDF document text
    • https://jisawawaxiwibes.weebly.com/uploads/1/3/1/6/131606947/b96358c41692f7.pdfIn PDF document text
    • http://pilefubasusuz.iblogger.org/2988074897.pdfIn PDF document text
    • https://site-1168501.mozfiles.com/files/1168501/tizevaposememidizutawu.pdfIn PDF document text
    • https://site-1177005.mozfiles.com/files/1177005/17056890401.pdfIn PDF document text
    • https://rurawovupotoli.weebly.com/uploads/1/3/4/0/134017211/6961857.pdfIn PDF document text
    • https://kivalake.weebly.com/uploads/1/3/4/8/134885121/fadc70584e.pdfIn PDF document text
    • http://sikojomur.22web.org/97982734369.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/pexedesejuw.pdfIn PDF document text
    • http://torevifij.iblogger.org/64165801012.pdfIn PDF document text
    • https://lefofikik.weebly.com/uploads/1/3/5/3/135316562/4124236.pdfIn PDF document text
    • https://kogexabisuzim.weebly.com/uploads/1/3/4/3/134322867/rejudagawovon.pdfIn PDF document text
    • https://jixusalozexifan.weebly.com/uploads/1/3/1/4/131407855/fd9c6428.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/mijumomub/internship_cv_template_word.pdfIn PDF document text
    • http://fepirag.epizy.com/wiximad.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/blumberg_form_stipulation_of_discontinuance.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/17380639941.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/20021693875.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17D 5724 bytes
SHA-256: 925e2ec7351e32f9b8cb8846319e766834519a93d945f2e906e5dedd56025447
font_01_sfnt_off0000e4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EE 10228 bytes
SHA-256: 73468b73a4fdce2bb34d7534351ae2004239d1d6e5542152c00b3db4bfacff60

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