Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7cd7ed3ff8e458…

MALICIOUS

PDF

71.9 KB Created: 2021-03-18 23:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: af69be4ebf7017e35c4273e40ca65915 SHA-1: 744586906dd3dd73f063e149a27e30af0e776aea SHA-256: 1e7cd7ed3ff8e458c3520fd561e7bb56e60eba7c24ed577eb553300dca7f62c1
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 0.9998

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://jottigo.ru/wix?keyword=romeo+and+juliet+timeline+worksheet+pdf PDF link annotation
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/9145936.pdfIn PDF document text
    • https://pulapiselipatux.weebly.com/uploads/1/3/1/3/131378970/6840907.pdfIn PDF document text
    • https://dotolisode.weebly.com/uploads/1/3/4/6/134616401/fulat_xawufibipatodiv_zozobinudobidaj_misuzibil.pdfIn PDF document text
    • https://cdn.sqhk.co/seduregudire/ohajbgd/facebook_logo_2019_for_business_cards.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/s6zjcjb/street_fighter_uppercut_move.pdfIn PDF document text
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/be6b65328.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_5a53eacbf5ad4ec7b93d8c9103bd2ac5.pdf?index=trueIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_48f03a2543744d4eacdc11e6b0572589.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b6ea4b-bf5d-4f3b-acbc-45cef3e5f813/62253929146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6511e702-fcfb-4092-8d2c-df1701eac15c/63991453982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf30c278-77f4-4969-986b-f65dd3e3cb5a/what_is_a_manhood_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/reforma_aeroporto_santos_dumont.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/4950967777.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/note_20_ultra_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac9fda1-06ff-4be3-8cb2-d686c7b201bc/kewilujisetarujezenewaj.pdfIn PDF document text
    • https://5f90d536-2a72-4461-adff-280afd3056cb.filesusr.com/ugd/27c394_9e9c0497a2f542b9919c126a1b8cb8c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/084807b3-d595-406f-8a8f-47c0bc9c0ed8/92334925939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb260b7-4f85-4d88-8ec1-85f42c82ab0d/bagokugebupenazivegiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8cfab7-78cc-4af1-a902-30b82d985221/eaton_fuller_manual_transmission_oil.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_off0000db9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9E 5520 bytes
SHA-256: c181ee6d7565fa344daa722101191f53047ec937a0d110a4edabc399b2dbe7b3
font_01_sfnt_off0000ee4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 9920 bytes
SHA-256: 7175bfb9938d305c87ca00efe9c0a31db46ed21fc8f74875fb3b9ab576a07ce3

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