Malicious PDF — malware analysis report

Static analysis result for SHA-256 0340098539618bc5…

MALICIOUS

PDF

74.5 KB Created: 2021-03-20 02:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f169f3379ba65a8320772b1b672c99bb SHA-1: 54548b104f31f59515f43961ea71c8c2a48917e3 SHA-256: 0340098539618bc538b20a7dbb302035795ea4718462fe7f05f0906add9ea986
256 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users. One heuristic specifically identifies a brand-impersonation lure for Yahoo, directing users to a redirector URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely credential phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dagatofolake.weebly.com/uploads/1/3/0/8/130874029/969f2f.pdf.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://botokaw.ru/award?keyword=afro+asian+literature+quiz+pdf PDF link annotation
    • http://lagulesuko.medianewsonline.com/66457351589.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490369/normal_60027cb80fc6c.pdfIn PDF document text
    • https://dagatofolake.weebly.com/uploads/1/3/0/8/130874029/969f2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410975/normal_5fdcf650729e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387050/normal_5ffa00aa87913.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/6923ccf7-1fb9-4d8a-8929-91856c3bf5ae/edgestar_ice_maker_not_making_ice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77a6c96-a670-47e5-be68-64972304a4d5/89925413605.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/venini_electric_oven_manual.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/hp_7520_will_not_print.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/sisoraxades.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/nationalism_and_ethnic_conflict.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af986693-482e-4827-bcf4-de47ef148838/diablo_3_set_dungeon_guide_demon_hunter.pdfIn PDF document text
    • http://pikaderobiw.atwebpages.com/81822014441.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/breadman_bread_machine_manual_tr555.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/double_bed_sheet_set_big_w.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/46952269204.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_off0000e475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE475 5200 bytes
SHA-256: a64413ecf95dcf0ba8aae428acd73d6cecbb2453c9a0880e4dafc6eadce0441b
font_01_sfnt_off0000f63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 10980 bytes
SHA-256: 156dcea6f3beb2dbe23782e8a05900bfa2dd7471d2ebd13e345ea1268b6ba5bd

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