Malicious PDF — malware analysis report

Static analysis result for SHA-256 771b579c96511270…

MALICIOUS

PDF

83.9 KB Created: 2021-01-11 06:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 39e03f5bdbe4bf02e8c72bd09c65defc SHA-1: 68c3429f0949880d00537647eed47c60f5f76daa SHA-256: 771b579c965112701f8b9a07dcfecdc302c93a231e3eb2d87be292c6df78378d
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The PDF contains numerous embedded URLs, with one prominent URL pointing to 'traffset.ru', suggesting an attempt to redirect the user to a malicious site. The presence of a link farm on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://traffset.ru/123?utm_term=texas+professional+associations PDF link annotation
    • https://site-1175753.mozfiles.com/files/1175753/gaxofununokofefalexojug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5fa73aa1d7e7e.pdfIn PDF document text
    • https://site-1171656.mozfiles.com/files/1171656/60923013665.pdfIn PDF document text
    • https://site-1172607.mozfiles.com/files/1172607/makeup_slime_fluffy_rainbow_slime_simulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465398/normal_5fac112294b64.pdfIn PDF document text
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/8950303.pdfIn PDF document text
    • https://site-1230430.mozfiles.com/files/1230430/spanish_learning_book_free_download.pdfIn PDF document text
    • https://site-1217043.mozfiles.com/files/1217043/39350296249.pdfIn PDF document text
    • https://site-1174313.mozfiles.com/files/1174313/triblive_valley_news_dispatch.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/2b616.pdfIn PDF document text
    • https://site-1168215.mozfiles.com/files/1168215/18345187689.pdfIn PDF document text
    • https://site-1168136.mozfiles.com/files/1168136/94685308388.pdfIn PDF document text
    • https://site-1167954.mozfiles.com/files/1167954/witcher_2_crafting_runes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFE 4816 bytes
SHA-256: 1c24d309cd48c1de822da9cc2880d2f10e184957f56ef1a9a329b2ccb260decd
font_01_sfnt_off00011067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11067 10588 bytes
SHA-256: d1e37e2baef05fe72131d33fde426abf847a799ed34955eef15332df121241f9
font_02_sfnt_off00013470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13470 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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