Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06c68af06274cec…

MALICIOUS

PDF

92.6 KB Created: 2021-02-28 19:28:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 51a1a747d1d3864a189e767646d21f9b SHA-1: 1f05cd0338dffc0b96106a9c0bbe7a5784a09f1a SHA-256: d06c68af06274cec7fcf42fb093bc2e6b2433fa7f9290dff757cf5ce2810c054
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that is likely part of a phishing or malware distribution scheme. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, suggesting an attempt to create a link farm or distribute malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=free+online+computer+training+classes PDF link annotation
    • http://blognews.top/26449351688echuf.pdfIn PDF document text
    • http://fastdonwload.space/the_unending_game_freejl2zi.pdfIn PDF document text
    • https://kaxamutibe.weebly.com/uploads/1/3/5/3/135348628/2826300.pdfIn PDF document text
    • http://nanolenka.xyz/romeo_and_juliet_1968_and_1996_balcony_scene_comparisonrgqlx.pdfIn PDF document text
    • https://momewevegugeb.weebly.com/uploads/1/3/5/3/135326076/2d35e9ac94.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/kolatesekavozu.pdfIn PDF document text
    • http://getcabinets.xyz/xukaneslgx6f.pdfIn PDF document text
    • https://jotozorofelafik.weebly.com/uploads/1/3/1/4/131405965/9264210.pdfIn PDF document text
    • https://fekalebewobazo.weebly.com/uploads/1/3/4/6/134668576/e6b7e.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/1063741.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/dufekifaral/tipatewuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/xuvamivafasu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/android_studio_image_asset_size.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/adjectives_key_stage_2_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/101th_amendment_of_indian_constitution.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/the_washwoman_short_story_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/bangladesh_navy_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/brocade_6505_hardware_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/marine_net_corporals_course_leadership_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/ferrite_core_transformer_datasheet.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012768.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12768 26536 bytes
SHA-256: ec7b87cddd97f85595f47841a7f8d18c71998837a7918f6a84ef16a64f099efd
font_00_sfnt_off0000f089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 5088 bytes
SHA-256: 2b24dd87dcc7a4f409c7a52165f2b1155ae16b0ab545936ed866c213d5390608
font_01_sfnt_off000101be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BE 10968 bytes
SHA-256: cec11a1a71f80b3e0bfa7719a7292eb52daa4ee911411f3d8e314d24a3843ca5
font_03_sfnt_off00015669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15669 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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