Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec8af6767b0440c9…

MALICIOUS

PDF

73.8 KB Created: 2021-02-08 06:28:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3120b4cb7c8a74fd82143e20e94f390d SHA-1: efe83dc86898fc7d0723e1e3fe3fab4ee208aa1f SHA-256: ec8af6767b0440c9cf7e483579a007791c0b1a3a95a200d1f7296076f1552877
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('jottigo.ru') and another to a PDF file on a potentially disposable hosting domain ('saudiautoinsurance.com'). The document body, though heavily obfuscated, suggests a lure related to a 'company annual report'. No scripts were extracted, but the presence of multiple external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jottigo.ru/aws?utm_term=hf+company+annual+report PDF link annotation
    • http://saudiautoinsurance.com/buck_mcneely_theme_songyc31m.pdfIn PDF document text
    • http://design-kvartira.info/sibanatamodujuzlqet0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450728/normal_60209b6e47b44.pdfIn PDF document text
    • http://mebesovinu.22web.org/vukekir.pdfIn PDF document text
    • http://price-list.moscow/jatajedajemunuwuzajozi6uvfu.pdfIn PDF document text
    • https://segamivudafipem.weebly.com/uploads/1/3/2/7/132740242/2486871.pdfIn PDF document text
    • https://gedepaxu.weebly.com/uploads/1/3/1/3/131378821/5235202.pdfIn PDF document text
    • http://douchely.xyz/player_unknown_battlegrounds_pc_apknx40m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5fe088cf41908.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/suvuzamojewi_fejatoje_wewasakowuvar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_5fe9d5e1d7827.pdfIn PDF document text
    • http://astrology-personal.online/ian_dury_and_the_blockheads_tribute_bandslashs.pdfIn PDF document text
    • http://zebrait.fun/214941441326nt0x.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/9579504.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://povezemusugag.rf.gd/2010_f250_forscan_spreadsheet.pdfIn PDF document text
    • http://jutodit.epizy.com/mosesenad.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/3157439412.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/givadibumunasubelu.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_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 5048 bytes
SHA-256: c1dcc394151561d3b961cdd79b10e79a318ba014d097f36c24775eb2252d4133
font_01_sfnt_off0000f394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF394 11964 bytes
SHA-256: 9fc8dd4feab2f2cffdf158a168215b66410ad66c7d23cebc9a6b74f91e391c26

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