Malicious PDF — malware analysis report

Static analysis result for SHA-256 9100db15565526c1…

MALICIOUS

PDF

80.1 KB Created: 2021-05-08 09:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e9acb2919f7d70747335b5e6d169f9b5 SHA-1: 58237915c9108fa3864bb9b99b4e9532fe86f81e SHA-256: 9100db15565526c17af964ceae90d631ca3eb5812a7afe0eaa0e8bdfec1b2e8c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/strik?utm_term=char+broil+analog+electric+smoker+manual PDF link annotation
    • http://familyit.info/pixupu8dhxs.pdfIn PDF document text
    • http://natiral.space/do_all_2015_jeep_cherokees_have_transmission_problemsghdkq.pdfIn PDF document text
    • http://panedapupugaxe.22web.org/christian_songs_tamil_video.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/8547689.pdfIn PDF document text
    • http://chelobaka.space/35697075913d1sfb.pdfIn PDF document text
    • http://cmb-accueil.com/xuzast3c6w.pdfIn PDF document text
    • http://bigswinner.space/lyrics_i_don_care_about_anything_but_you_wear_your_hair2bu9l.pdfIn PDF document text
    • https://zatuduxe.weebly.com/uploads/1/3/4/5/134595584/f8129.pdfIn PDF document text
    • http://xikumidevulofo.iblogger.org/what_is_religious_individualism.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_6500b68f36aa488ab58621da6acaf793.pdf?index=trueIn PDF document text
    • http://ritarejameja.epizy.com/53901603888.pdfIn PDF document text
    • http://xatesowogexiwu.epizy.com/25873209656.pdfIn PDF document text
    • http://vipebajivakal.epizy.com/36266538524.pdfIn PDF document text
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_3c711423b20a48479a20132677ed302f.pdf?index=trueIn PDF document text
    • http://gugamofizuxeg.epizy.com/zidofujalevefobosufedejo.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_474820587ddf46fc93facd0d62be768f.pdf?index=trueIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_11c348b2566241bd834471c362ec5a67.pdf?index=trueIn PDF document text
    • http://gazisemodab.epizy.com/11936516660.pdfIn PDF document text
    • http://tesalivolanimeg.rf.gd/49891370144.pdfIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_6bf4460c14154fe7a2bb9d23a17b91d0.pdf?index=trueIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_a899ade27adc4cd7bbe1f73266943a00.pdf?index=trueIn PDF document text
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_4b8de9ca2ebb4356b49dcb7513dc7c14.pdf?index=trueIn PDF document text
    • http://jixonolalosixew.rf.gd/86552279358.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_off0000fde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE0 5320 bytes
SHA-256: 914d6abc3aa04d1507fd58a91113a64e27c963d01adb391f15e3f679a87ad4c7
font_01_sfnt_off00010fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCC 10128 bytes
SHA-256: fa3237458c1b76c86c74f7f28bdf77b4c8e91807b14c2876e4f6c2f929a641d6