Malicious PDF — malware analysis report

Static analysis result for SHA-256 754aaca89ba95c94…

MALICIOUS

PDF

81.3 KB Created: 2020-12-05 14:27:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f610c13bf904c27e290b174fd1b69960 SHA-1: 9ce332ec8c8d0b95192985b27987fc36a8888758 SHA-256: 754aaca89ba95c9401cba3986a976a94d7a2170b5c8ee87e1a1c70e912a5c64a
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffnew.ru/strik?utm_term=godzilla+jet+jaguar+handshake PDF link annotation
    • https://fanaraligo.weebly.com/uploads/1/3/4/6/134620410/balowoxepur.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1d44b872.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/wuropu.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/lupajapesu.pdfIn PDF document text
    • https://sebidodeg.weebly.com/uploads/1/3/4/4/134438526/fuwokemijo.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/jagux/bosch_axxis_stackable_washer_dryer_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a1c9698b02c7f224c6f/t/5fc735c25060c93fcd795239/1606890951659/galaxy_sky_shooter_game.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/tizisiluzonopamudipiso.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e110403f5353fd95a22f/t/5fc261152dd96f59183badc9/1606574365509/83217882007.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/organs_of_speech_diagram.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd8a92bbd740658005df2/t/5fc353d8f8cdb769c64db0d1/1606636505495/jonelemuzedosukinukavu.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/amelia_jane_again.pdfIn PDF document text
    • https://s3.amazonaws.com/timafatafej/cassandra_espiritual_punto_puntos.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_off0000ec50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC50 5968 bytes
SHA-256: c138d21c4c16f325649263b8934fa14380066a01d488c4755076b3d678a362d5
font_01_sfnt_off000100e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E3 5308 bytes
SHA-256: 0c188db00b5282ce43739dbdd9695b75ad7d9496b962509cebeeb936286c676a
font_02_sfnt_off000112fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FA 10840 bytes
SHA-256: 25cf0d4d18edfc5b3b1b4df9dc62088945131eea91717c1da576e2ada819df75

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