Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1cb19972b3271e1…

MALICIOUS

PDF

80.2 KB Created: 2021-03-31 03:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b225e4bb31ba7b71039365800c4a1f3 SHA-1: 956bca892007bfee5e83e8c990afffc21948882b SHA-256: e1cb19972b3271e1d77ab0919e671fa9a0824a15d884a0927c0ccf47f5c881b6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDF files, suggesting a link farm or SEO manipulation tactic. The embedded URL and the document body indicate a lure for game downloads, which is a common phishing pretext. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a phishing payload or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wix?keyword=halo+combat+evolved+pc+download+free+unblocked
    • https://tonibakak.weebly.com/uploads/1/3/5/3/135346506/videger.pdf
    • http://wowit.pro/14967864450qrqed.pdf
    • https://pegufozexak.weebly.com/uploads/1/3/5/3/135317465/sulisikar-kifagejenefap-tafifojole-migofim.pdf
    • https://liziwozubol.weebly.com/uploads/1/3/4/8/134851467/2752886.pdf
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/51eaeab9a72.pdf
    • https://cdn.sqhk.co/fafixefeb/WjjDbeB/tivakovado.pdf
    • https://sulekigotama.weebly.com/uploads/1/3/4/3/134307446/35e49af2ad.pdf
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/kasofekagul.pdf
    • http://paxenazubenib.mygamesonline.org/enterobacterias_veterinaria.pdf
    • https://keboxatoxumire.weebly.com/uploads/1/3/4/5/134591907/7870244.pdf
    • https://kisetujetu.weebly.com/uploads/1/3/2/8/132814277/wedunadidu.pdf
    • https://dezusopivelisuk.weebly.com/uploads/1/3/4/7/134734284/mabisejebebi_fobefukudixifer_tenuruve_donozuki.pdf
    • http://limaxinsto.xyz/balanza_de_pagos_peru_2019l9fox.pdf
    • http://tuwasukam.getenjoyment.net/fixing_computer_courses.pdf
    • https://cdn.sqhk.co/pogadidotilu/FxA8jgs/galactic_colonies_mod.pdf
    • http://zovofuti.mygamesonline.org/lexinogurejedil.pdf
    • http://digitalliteracyinstitute.com/79182434411coye6.pdf
    • https://cdn.sqhk.co/zogobadakedu/ggihjV2/worifisegasowo.pdf
    • http://ig-mediateam.net/fobogojefosogovosawonoxu4l2u.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2e5d043e-dfde-417b-9e67-1891bd256e8f/is_lg_linear_compressor_good.pdf
    • https://uploads.strikinglycdn.com/files/8609e6a3-2850-4987-b3af-52a93c1364d1/netgear_wnr3500lv2_review.pdf
    • https://uploads.strikinglycdn.com/files/4b1e3480-0968-44ee-9cf7-641c5704d2a9/hi_point_model_c9_9mm_luger_ammo.pdf
    • http://letutemoxeluz.onlinewebshop.net/samsung_55_inch_led_box_dimensions.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_off0000ed8a.bin
5c5d3f5e832355508558beb75a40eae49db8f185b4fee278189b22992c94a165		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 5276 bytes
font_01_sfnt_off0000ff72.bin
11cfe87130c1e558dc167aa9b80f88f909653c5fbd25b96a14a6f4a2c159182b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF72 11032 bytes
font_02_sfnt_off00012546.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12546 4324 bytes

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