Malicious PDF — malware analysis report

Static analysis result for SHA-256 701fe1f564483981…

MALICIOUS

PDF

84.4 KB Created: 2021-05-21 19:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 48585364be68be023a90bee7521900c4 SHA-1: 726cb16e04033d0e5bd009bc9c363e2ab1471909 SHA-256: 701fe1f56448398117f6de9e13bb401c50e8316e995c3412f0148e0cd6f03d62
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 0.9998

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://druttle.ru/strik?utm_term=g%25C4%25B1dalarda+protein+tayin+y%25C3%25B6ntemleri PDF link annotation
    • https://mesoxofag.weebly.com/uploads/1/3/4/3/134314287/zimelefuvumure-tuxotubakadiza.pdfIn PDF document text
    • https://voxesisa.weebly.com/uploads/1/3/4/3/134349259/farof_jupebasuz_siwabutub_vejegivegabole.pdfIn PDF document text
    • https://falaxejuwutop.weebly.com/uploads/1/3/2/6/132681153/moziwubelosotokol.pdfIn PDF document text
    • https://bakemelufipunuj.weebly.com/uploads/1/3/4/8/134888112/vowonibovi.pdfIn PDF document text
    • https://rebadezoj.weebly.com/uploads/1/3/6/0/136027304/1ae993ca8cb.pdfIn PDF document text
    • https://kinojakabajowus.weebly.com/uploads/1/3/4/7/134774968/powijozopomi_jawov_refirufugisuwim_suvinagu.pdfIn PDF document text
    • https://jisawawaxiwibes.weebly.com/uploads/1/3/1/6/131606947/7465154.pdfIn PDF document text
    • https://vexuzunudupugez.weebly.com/uploads/1/3/0/7/130740013/7650400.pdfIn PDF document text
    • https://kotasixunepa.weebly.com/uploads/1/3/0/7/130776076/1325556.pdfIn PDF document text
    • https://begopafisofebe.weebly.com/uploads/1/3/3/9/133997970/jisakif-suwalufop-nugonufaf-safojepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/86fc97a9-1f6c-46c8-9084-ab973e02bd11/81400187031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b24b035-45e3-488d-8786-dc6ff6512ba1/ukulele_songbook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/15177584090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31608c25-ee5d-4d2e-9a25-ad85cc848212/black_hack_2e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd701562-7180-46a0-a94c-77b00c0c3e40/30263952504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d647ed-c6cd-4a46-897f-f47c410113d2/12360101965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72edb2b-dfcb-4bd4-a840-7a4c8bc7e033/skyjack_3219_scissor_lift_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f3d131b-2aa6-4894-8617-6c0dde3d0b64/denujolefopixe.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/kovepor.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_off00010acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 5228 bytes
SHA-256: 8c0d28f600fe5e67492f10d9950de57ca67dfe78c96b71fc2ffd680323fa1520
font_01_sfnt_off00011c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C53 11236 bytes
SHA-256: 1f85611b95d480e7ff5129ad138a7f9f628899ced68a965ab80374bf97696470