Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddb83fca46adcef…

MALICIOUS

PDF

74.6 KB Created: 2021-05-22 19:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06ea3685b33c4448dd2b1c35e90608cc SHA-1: a5dd4b57fa13d84a5f7c6cadd3717f6e0089ddd5 SHA-256: 1ddb83fca46adcefd1213a3852a3e6a3a10a1d788c39be695d87a6520a3fdff4
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a link farm on disposable hosting, as identified by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, suggests an attempt to redirect users to potentially harmful content. The embedded URLs, particularly those on weebly.com, are suspicious and likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://sirefofaf.weebly.com/uploads/1/3/4/5/134523631/gimogowapikez.pdf In PDF document text
    • https://dudunubute.weebly.com/uploads/1/3/4/1/134132035/3932a1d.pdfIn PDF document text
    • https://binewetakug.weebly.com/uploads/1/3/5/3/135326509/60c4b85b.pdfIn PDF document text
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/714f1fbcfa.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/ea377d.pdfIn PDF document text
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/xiwoputo-fixinigiv-mejemizolo-dijozepuxow.pdfIn PDF document text
    • https://kewenarizifosiz.weebly.com/uploads/1/3/6/0/136092989/banilabajivowop_wogevimaverovep_fefofirijibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/vAIYpVcV8Aw/wb?keyword=how%20to%20reset%20washer%20amanaPDF link annotation
    • https://s3.amazonaws.com/vuforewebub/rijakewaguju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96da2fb1-341a-40bc-9307-5cd40534b827/19061889464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68f08b17-e67b-4013-96c1-f2b62bb33af4/8095945588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee26223-2cc3-4daa-a334-55298e47eedc/80544432915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae58238e-5947-4ae4-961d-00265b0f1437/proform_xp_580_treadmill_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f736a0-1a76-41db-8f7e-f360997ef614/behringer_mixer_x2222_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/vegabapugetukola.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/guvirijedovezenavis.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/magnus_chase_and_the_gods_of_asgard_book_1_online.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/bowigulimugubovususititet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb2db90-e9ef-4ade-87a0-1f2cf57c4ba7/what_does_the_song_neon_moon_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e55a78-9621-45ac-9f7a-f5aa00f7d0dc/ledaxawakideluj.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_off0000e7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E9 4948 bytes
SHA-256: ce4b2655097332a360e3eff9f1bec868b186cafd313356aa27b2106dc431d3c4
font_01_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 10860 bytes
SHA-256: a8431d7619373f8127b829bc43ee21a5ae373e86e929e7009f61d5297fdc3374

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