Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ade38475c7a0ca…

MALICIOUS

PDF

75.0 KB Created: 2021-03-10 06:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2a8368c1e9e43d86c32026fe9170bfd3 SHA-1: 90e6c932096464d203cd872fb0380052883e5b39 SHA-256: a5ade38475c7a0ca658567533bd9f324401dbdb6d5232c6c9ba968019640b73f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://bologen.ru/award?keyword=example+of+application+letter+format+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445128/normal_5fcccc5cf0572.pdfIn PDF document text
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/raromutenu.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/jajcWhj/12506004759.pdfIn PDF document text
    • http://helplnstagram-confirm.com/he_is_the_great_i_am_the_everlasting_father_lyricsj4fun.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/gdA22ha/37974503569.pdfIn PDF document text
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/runavedaran.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/cvn8klk/sky_gamblers_storm_raiders_2_best_plane.pdfIn PDF document text
    • https://wifaborasumekig.weebly.com/uploads/1/3/2/6/132695644/jukitovafov_jozevo_juvigoxib.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/cvhjgeI/33839631777.pdfIn PDF document text
    • https://duketexu.weebly.com/uploads/1/3/4/7/134725944/bbe70.pdfIn PDF document text
    • http://reestr.site/39615617954jurpb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472793/normal_5ff66e5959902.pdfIn PDF document text
    • http://stankoff.org/ms_excel_2016_tutorial_free_download83eb0.pdfIn PDF document text
    • https://lubawefajisewo.weebly.com/uploads/1/3/4/4/134443910/losuxunololiwegub.pdfIn PDF document text
    • https://zobaretax.weebly.com/uploads/1/3/1/4/131482953/0fa4690aa7b.pdfIn PDF document text
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/2d62b6.pdfIn PDF document text
    • https://xegafifa.weebly.com/uploads/1/3/0/7/130776616/govegagudebotigire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_600521370dbbe.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/788e5da6-0cfa-4bee-b6a4-5de2cb77b876/33231522708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dccb191-fe28-481d-a726-a58eea144cc4/sosakurixep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6d8bd7-9426-4af4-85db-707b4be4826f/97204877754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09502410-9ebb-4ec8-b8c6-f34a9aafc1fc/how_to_transfer_a_call_on_a_panasonic_phone.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_off0000e9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F1 5148 bytes
SHA-256: 981fb1fef468e3b97f9b220f7a35b3560052db8596ff326f6d7bc665682759e1
font_01_sfnt_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 10324 bytes
SHA-256: 1637e0ef51624c8d4562e88ef27189cf40e6298b3158825ed565e47c01853756

Open this report in the interactive analyzer, or submit your own file for analysis.