Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0d77bfb6b6bf86…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 06:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ba315f390606365f50f58a6e23aa749e SHA-1: b2a941a1c192d69c9dbdf1126d4653c4b259847d SHA-256: ce0d77bfb6b6bf86113209f3ccc6357650b51a9be656b7bbd3f464a8fb793e8e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via the linked sites. The document body's content is minimal and appears to be obfuscated or placeholder text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://zajinet.ru/wix?keyword=abnormal+psychology+comer+10th+pdf PDF link annotation
    • https://bipuwuvi.weebly.com/uploads/1/3/0/7/130776795/fc32407b70e.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/d4aa9b5b6.pdfIn PDF document text
    • https://bojuzogonugux.weebly.com/uploads/1/3/5/3/135304036/8119050.pdfIn PDF document text
    • http://optarfes.com/what_is_the_best_countertop_microwave_to_useiyltl.pdfIn PDF document text
    • https://tufuziboserivu.weebly.com/uploads/1/3/1/6/131636644/xovodudad_pudik_rijiwisuzunefaz_lufofi.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/a50d32e3f1c.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/XhbtZjf/memaxubomuzemimisinadeli.pdfIn PDF document text
    • http://usmileofficial.site/8061479756807a30.pdfIn PDF document text
    • https://zikawudewodag.weebly.com/uploads/1/3/4/5/134585044/6582193.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/ehahghj/95710834772.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/ib1TWig/78399206849.pdfIn PDF document text
    • http://antonioit.fun/vorerobemegexejebimudejo81nic.pdfIn PDF document text
    • https://xaxotomelaxip.weebly.com/uploads/1/3/4/5/134511260/kuvetuba-polalevasi.pdfIn PDF document text
    • https://bunafigokakataw.weebly.com/uploads/1/3/0/9/130969192/6351740.pdfIn PDF document text
    • http://afracheat5.xyz/bedifazomawufuforblw.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/LiezGih/nosufanoxolatuzibigilaven.pdfIn PDF document text
    • http://xtreme-sport.ru/pakenixabuvjesf.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/0262824b-eac8-47b1-bfd7-709bf046d187/fonabalive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a9a401-1cf4-4ef1-93f3-02051f7d356c/unity_in_art_def.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0593fa05-8054-4641-9f60-5bb5a1d7e0c1/what_does_seeing_the_number_800_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3a73a1-363f-4209-9302-bc09b1b32e12/how_to_clean_samsung_washing_machine_filter_front_loader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b6f9ad-15dd-4d5d-9158-3bd2b6279321/how_many_calories_in_a_hard_shell_beef_taco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8450fc6-0053-46bb-8695-f17bbeeb1dba/23277341897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f420a1-7371-418f-af50-841e764d566b/80211119944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1875b33d-d656-4b34-99e0-f2bd56ecc714/zebulufezuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f74be0d8-0604-4e5c-9491-7f0296a6b759/what_is_the_importance_of_visual_media_in_your_life_essay.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_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 5736 bytes
SHA-256: d8b77c34a590183d8b6c4e746e572ddc48bfef0f83245fb7365f582efd4791f3
font_01_sfnt_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 10720 bytes
SHA-256: 667c0e8da933bd040fdb56c6b316eb7742b2fcd7418ccbb39fa5f3733d51de6d
font_02_sfnt_off00011183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11183 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c