Malicious PDF — malware analysis report

Static analysis result for SHA-256 d508677c08322135…

MALICIOUS

PDF

75.6 KB Created: 2021-02-15 07:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f8c0eab3b285a138929a8a47c389f803 SHA-1: 7ea72a9e6cfc3e6ab7a8895be11dffa2e26062a5 SHA-256: d508677c08322135246538ddefc6226a68408badbdd775d7320408d2ac0dee5b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to malicious content or phishing sites, and the document body, though heavily obfuscated, contains references to 'araba yar1_1 apk day1' which may be a lure.

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
  • 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.
  • 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://jottigo.ru/aws?utm_term=araba+yar%25C4%25B1%25C5%259F%25C4%25B1+apk+day%25C4%25B1 PDF link annotation
    • https://cdn.sqhk.co/gubisagebuto/BgfIPiG/little_alchemist_knowledge_combos.pdfIn PDF document text
    • https://futokiwusilo.weebly.com/uploads/1/3/4/4/134458686/bosugudopapivugari.pdfIn PDF document text
    • https://denagivar.weebly.com/uploads/1/3/1/3/131383646/zarofusod.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/dimumafemiwivuj.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/3636328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491155/normal_60179db2b1450.pdfIn PDF document text
    • https://zofitete.weebly.com/uploads/1/3/2/7/132740948/1d63662bb.pdfIn PDF document text
    • https://goporurozabi.weebly.com/uploads/1/3/0/8/130874573/4529221.pdfIn PDF document text
    • https://cdn.sqhk.co/lapitobexeva/Pznijh2/1943136281.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5ff63036daf85.pdfIn PDF document text
    • https://tedajurilazunu.weebly.com/uploads/1/3/0/7/130739962/7468471.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/rnTZQhi/crossing_over_occurs_in_mitosis_or_meiosis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386842/normal_60047f72ab03e.pdfIn PDF document text
    • https://kuledeju.weebly.com/uploads/1/3/0/7/130775905/tetow-vejeve-lerasuz-tazokavegejo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450506/normal_5fc77314bef7c.pdfIn PDF document text
    • http://1xbet-registr.site/la_replicacion_del_adn_es_anabolicanhr9h.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF2 4644 bytes
SHA-256: d69df4181762a1077c651ef3d393456546279b2fd2288bbd62cae314b94c5a5a
font_01_sfnt_off0000ebb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB5 12452 bytes
SHA-256: d7a2cad0f95f9a7864643caadd7f8cf5fda9cf775a38595ddd1cc5c95d74f565
font_02_sfnt_off0001116f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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