Malicious PDF — malware analysis report

Static analysis result for SHA-256 498827d7090bb247…

MALICIOUS

PDF

87.7 KB Created: 2021-02-23 20:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 07422f7fdac1469897859f4eb79ae801 SHA-1: a1ea6ca2ab122394171a50c06014d399f5e93344 SHA-256: 498827d7090bb247edcd67db1d287dabe19b85b38ed643847d7c750b5a231ac1
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly subdomains, suggesting an SEO spam or link farm operation. The presence of urgency language further supports a phishing or deceptive intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate malicious activity, likely aimed at redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://bologen.ru/123?utm_term=mastrena+2+espresso+machine+price PDF link annotation
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/1f48d84.pdfIn PDF document text
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/jedupikudomog.pdfIn PDF document text
    • https://mirijanonukuzo.weebly.com/uploads/1/3/2/7/132740352/xojegajan.pdfIn PDF document text
    • https://zowadite.weebly.com/uploads/1/3/1/3/131380399/soravi.pdfIn PDF document text
    • https://kanelepamub.weebly.com/uploads/1/3/4/1/134132184/kiluvok.pdfIn PDF document text
    • https://kaxagigunuji.weebly.com/uploads/1/3/1/3/131383746/mogetamuson_tosuxejanuf.pdfIn PDF document text
    • http://kersita.space/loudoun_now_best_of_2020kdvwm.pdfIn PDF document text
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/jusaseketab_wiror_dewusidefiga.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
    • https://s3.amazonaws.com/vabedafozo/fast_food_places_that_give_you_free_food_on_your_birthday.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/39686375084.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/periodic_table_worksheet_answers_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/24137823879.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/ladybug_baby_shower_invitation_template_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 5068 bytes
SHA-256: 5094fd10377391ab3716e4b32d2457063eeede088d71a53ffe0ac557ce2b7c0d
font_01_sfnt_off00011ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC5 10756 bytes
SHA-256: 0fd94a427c3f0297a3d2d4b1638d648e9aa078c5936ce76738930364fcfa4417
font_02_sfnt_off0001435b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1435B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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