Malicious PDF — malware analysis report

Static analysis result for SHA-256 129f4a3ed1ffd334…

MALICIOUS

PDF

70.7 KB Created: 2021-02-17 02:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 83d1b08d016453c95a110a75be490723 SHA-1: 1f9097b0b4ce23e4afd0fe6b8798db2cfe0ddadc SHA-256: 129f4a3ed1ffd334c0d96d44f3830aa928e6816d3bf5c986e0a3973620f2dc16
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate a high likelihood of malicious intent, specifically related to phishing and link farming. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/wix?keyword=mongoose+xr250+for+sale In PDF document text
    • http://skout.tech/wagatodiliwapaw9szdv.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/doretanadameti.pdfIn PDF document text
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/1681500.pdfIn PDF document text
    • http://tumbaa.space/airlines_manager_2_tycoon_guidev75m3.pdfIn PDF document text
    • http://mrt-64.ru/infinity_train_book_3da73p.pdfIn PDF document text
    • http://xosuxifareg.22web.org/mugatego.pdfIn PDF document text
    • https://wewowalowumuv.weebly.com/uploads/1/3/4/0/134040384/tafiz-sewewakaso-jimuf-vujageluzeloni.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/2hegdgg/snowfall_cast_teddy_s_wife.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/igtjhcc/mubuluvorikuvokafodezuba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lesizemub.epizy.com/speak_spanish_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/retalo.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/turbotax_federal_carryover_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/kaforatafo.pdfIn PDF document text
    • http://debukigezi.epizy.com/dinamica_transformando_agua_em_vinho.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/brownian_motion_video.pdfIn PDF document text
    • http://pivubererojasi.rf.gd/heifetz_leadership_without_easy_answers_chapter_summary.pdfIn PDF document text
    • http://zasagugidi.epizy.com/begebi.pdfIn PDF document text
    • http://tuxalazurasel.epizy.com/fimezilaxevafu.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/solving_linear_algebraic_equations_worksheet.pdfIn PDF document text
    • http://zitamekoliliwe.rf.gd/villager_sa_monate_mpolaye_song.pdfIn PDF document text
    • http://temipaz.epizy.com/52769244709.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_off0000d71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71F 5408 bytes
SHA-256: f3b8dee9f6e8e70a200a9e85df3752acbd4bc5d5f576344e4a75e7087f38c504
font_01_sfnt_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 10528 bytes
SHA-256: bd7f041a5baf5cb8cfce880d030eb089cabdefb0364a401d7443ce29b069a0a5

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