Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8311402c6189422…

MALICIOUS

PDF

105.9 KB Created: 2021-05-24 14:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d8ac3d107aea19ae7dc59896c02bfff SHA-1: d27a8b97fc13a4e64b93b028bf40cc865c7f57a3 SHA-256: b8311402c6189422f6e7c797f92d5cbc3e73d1d2418c5426020c2092a28d016a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to PDF files hosted on file-sharing services, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, suggests a lure related to downloading an ebook, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the extensive use of external links points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=primera+gota+de+carmes%25C3%25AD+epub+descargar
    • https://samabuwe.weebly.com/uploads/1/3/0/7/130739499/lopomotoborawedepezo.pdf
    • https://cdn-cms.f-static.net/uploads/4418791/normal_603c4bcaaa2c7.pdf
    • https://voxudipuxun.weebly.com/uploads/1/3/5/3/135319737/959b81e7331fbf.pdf
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5ff32ccb9bf2f.pdf
    • https://ruzovaberup.weebly.com/uploads/1/3/4/6/134651658/fitopijopusuwuj-kesotegimu.pdf
    • https://rifidikebipe.weebly.com/uploads/1/3/0/9/130969129/7669494.pdf
    • https://static.s123-cdn-static.com/uploads/4427785/normal_60019061570d3.pdf
    • https://cdn-cms.f-static.net/uploads/4366347/normal_605553975ad49.pdf
    • https://mijagipiked.weebly.com/uploads/1/3/4/5/134524971/3731d1.pdf
    • https://penugevofubelig.weebly.com/uploads/1/3/1/1/131164238/ded454ab461283.pdf
    • https://cdn-cms.f-static.net/uploads/4424007/normal_600f9de33fec5.pdf
    • https://static.s123-cdn-static.com/uploads/4388426/normal_5fec78e5d67a1.pdf
    • https://cdn-cms.f-static.net/uploads/4371265/normal_6029d19c3dec6.pdf
    • https://cdn-cms.f-static.net/uploads/4373261/normal_606010c765597.pdf
    • https://rapokivagifo.weebly.com/uploads/1/3/4/3/134338569/pevunaji.pdf
    • https://jopazidavasuzu.weebly.com/uploads/1/3/2/6/132681438/lonekexiraratode.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/loranoduzuja/gizojefumo.pdf
    • https://s3.amazonaws.com/tuxutedi/47846012496.pdf
    • https://s3.amazonaws.com/lowebemuwojiso/how_many_types_of_python_snakes_are_there.pdf
    • https://s3.amazonaws.com/tozaduliwubega/97490636660.pdf
    • https://s3.amazonaws.com/verirejon/hp_toner_cf228xc_price.pdf
    • https://s3.amazonaws.com/gedexim/bind_the_strongman_verse_meaning.pdf
    • https://s3.amazonaws.com/polexebuj/organizational_culture_examples.pdf
    • https://s3.amazonaws.com/rogugagatuf/bolt_action_vs_semi_auto.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ed1.bin
1b8a87bc6ce6493726dad6555f5a51f1aa917a1690580e3105fcbc93b32695ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED1 5332 bytes
font_01_sfnt_off000160ed.bin
8f3b513340c3e3ece687ddf8202bfa88f77f2b3064495afa5062d70620dbbb5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160ED 12816 bytes
font_02_sfnt_off000189bd.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x189BD 4324 bytes

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