Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a09d2ecbb05ba0…

MALICIOUS

PDF

74.4 KB Created: 2021-04-08 07:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 04de8db8b74d2bc1d91983567b2f28aa SHA-1: 3cf5e5eaaed0d2321ffe529a30400985d844f80b SHA-256: c1a09d2ecbb05ba0a4604f82d598e9c2fdbce4cdb919d8feb9163a78defbda53
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=civil+air+patrol+leadership+chapter+2+test+answers PDF link annotation
    • https://mopopapepiror.weebly.com/uploads/1/3/2/7/132741339/sojowategubeb-xotufomipe-fuzagagunibemab.pdfIn PDF document text
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/govetuzaji_kokelurup.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/hdiavhw/17340934353.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/jbjcO6Y/calendrio_outubro_2019_para_imprimir.pdfIn PDF document text
    • https://kasewipiliri.weebly.com/uploads/1/3/4/9/134901701/kuvugakebamepa_lefewuxew.pdfIn PDF document text
    • https://gajebafanagifim.weebly.com/uploads/1/3/2/8/132815836/6ab88bbca1a587c.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/savonezidesulovog.pdfIn PDF document text
    • https://biligimanud.weebly.com/uploads/1/3/1/4/131454089/1524699.pdfIn PDF document text
    • https://gexokatex.weebly.com/uploads/1/3/5/9/135960098/wasuzotoke.pdfIn PDF document text
    • https://tejalegevususo.weebly.com/uploads/1/3/1/6/131637178/torijezajewuvu.pdfIn PDF document text
    • https://povitopol.weebly.com/uploads/1/3/4/6/134648875/zemawul.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/28ec4867aa2.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
    • https://uploads.strikinglycdn.com/files/df742c61-101c-48b7-875f-03a17a5e2074/zupuwexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52195d1-ad22-4aa9-9db0-76ce6637123e/dell_latitude_e7450_price_new.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c09703-e525-496a-81d8-f3d4e9878b59/rinnai_rl94ip_propane_tankless_water_heater_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df118e07-c930-4eec-939e-b9aaa8314a26/core_java_se_9_for_the_impatient_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4fb450-73af-44f2-8a42-49afef9dd87b/91147562694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fd7b10-6779-4575-b789-545d6102fcda/stihl_ms310_farm_boss_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/244d8262-953c-440f-92a7-c556f0aa8fbd/what_is_the_sandwich_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f169d89-2b84-4618-a05c-ea4e8e16ca3b/gimpy_gimpy_plant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd92e96-ed79-4a05-9f89-1a85e672bf60/fuxepose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389c9160-9414-4086-b334-190993669b11/graco_swing_motor_broken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc5c330-fb01-4c8e-8524-ca0397cec22d/coleman_mach_15_rv_roof_ac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249c4e91-deb4-472c-bf34-1777e4b6b826/focusrite_scarlett_2i2_studio_bundle_g2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567ea06a-99a7-4c18-ba3a-829ac8a3c67a/honda_civic_service_center_near_me.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD759 5256 bytes
SHA-256: ec840336e6d7350c58a6b3b2d643735cd50eb563b6321aa307f21a6859e0d996
font_01_sfnt_off0000e948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE948 10696 bytes
SHA-256: ef7a593c3801e5000a05ff3673b30415c327d18a14692c9b38634a109a249504
font_02_sfnt_off00010d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e