Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0b9bd51f7bb6a1…

MALICIOUS

PDF

119.7 KB Created: 2021-04-07 01:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8846e34fc0a8f480c9e5fd28f784b37a SHA-1: cd3d9d077f5f0d8876f82839e9a87246469c72f3 SHA-256: db0b9bd51f7bb6a1654b65d1d5f471e8a257984e84d45c4524dd8d97f18922f0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Victim-Owned JavaScript T1059.007 JavaScript

This PDF was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It impersonates Facebook to lure users into clicking a link that leads to a credential phishing page. The presence of numerous external URIs and a link farm structure further supports its malicious intent. The document body is heavily obfuscated, preventing a clear understanding of its specific content beyond the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://mabunamu.weebly.com/uploads/1/3/4/9/134902385/fijez.pdf.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xajibur.ru/award?keyword=political+geography+definition+pdf PDF link annotation
    • http://ganirutejiz.iblogger.org/advantages_and_disadvantages_of_solar_energy.pdfIn PDF document text
    • https://mabunamu.weebly.com/uploads/1/3/4/9/134902385/fijez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fd074d92091c.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/jikowuzu/ioidijQ/47399793849.pdfIn PDF document text
    • http://loveantravel.xyz/the_noma_guide_to_fermentation_bookwf6f2.pdfIn PDF document text
    • http://koxavafi.22web.org/55000053447.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/ccna_1_chapter_4_answers_20182skst.pdfIn PDF document text
    • https://warasogufav.weebly.com/uploads/1/3/4/4/134440103/tolujan.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/c0gjRgg/41300392716.pdfIn PDF document text
    • https://cdn.sqhk.co/wamefuvew/aiihi0l/zynn_download_link.pdfIn PDF document text
    • https://saguwaxofules.weebly.com/uploads/1/3/2/6/132681351/geledolux.pdfIn PDF document text
    • http://teasmall.space/by_the_waters_of_babylon_plot_outlinelqmij.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/hegjii8/lajanivirowewekawelutusag.pdfIn PDF document text
    • https://zojubexetiw.weebly.com/uploads/1/3/5/3/135316795/xabizenajov-wetiba.pdfIn PDF document text
    • http://labiluwewinedu.22web.org/wolilanomirewatizikaram.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477369/normal_5ffb90534c61b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447079/normal_5fdbb4821318b.pdfIn PDF document text
    • https://tujuwofaxeg.weebly.com/uploads/1/3/2/8/132814826/4e336251988e400.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/26001131467.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/cute_cat_sleeping_images.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/last_cloudia_beginner_guide.pdfIn PDF document text
    • http://zijemuviwovo.rf.gd/badanamu_ponytail_song.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_off000196e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196E2 5344 bytes
SHA-256: 124a89371e5c28342dbca17baadc77722642ac5f3310d3215c2cf2cfef94ec27
font_01_sfnt_off0001a914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A914 11780 bytes
SHA-256: af003f191e984acafc8c7e3b9869d1f74e499be2ef77533d37ea2dbf4573cb2b