Malicious PDF — malware analysis report

Static analysis result for SHA-256 47057abfb4cddcaa…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 06:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7dee11d030c26f5352a4460af32a11c5 SHA-1: 9f4aa34754b82d8732347d1dcd2f16dd45993126 SHA-256: 47057abfb4cddcaa9a70ca21018e3e1d7c88eae6131bf1b9df8c1ca086581652
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malicious content delivery attempt. The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One of the embedded URLs, 'https://baarspo.ru/strik?utm_term=does+wic+cover+gerber+formula', is particularly suspicious and likely leads to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://baarspo.ru/strik?utm_term=does+wic+cover+gerber+formula PDF link annotation
    • https://totaguzoxexidi.weebly.com/uploads/1/3/2/7/132741029/xofezuw_lobaziwilurak_juzezogolivate_gamudud.pdfIn PDF document text
    • https://rogusedi.weebly.com/uploads/1/3/4/4/134433103/9fe12.pdfIn PDF document text
    • http://xepivutede.22web.org/backup_camera_app_android.pdfIn PDF document text
    • https://zizuvikugit.weebly.com/uploads/1/3/1/3/131384696/3797087.pdfIn PDF document text
    • https://babulavired.weebly.com/uploads/1/3/0/7/130775389/1940651.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_a9691f64d9b04b6bab8be91682593a82.pdf?index=trueIn PDF document text
    • https://8e8ef6ac-913c-489f-8395-c30730e7ba0a.filesusr.com/ugd/f39c52_74a587bb934344e9a53bf7419b2b4fc0.pdf?index=trueIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_de1911665ddf4ca2a8c4b21553d1aa13.pdf?index=trueIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_6db8ee0f14914b8aba41aeabead96166.pdf?index=trueIn PDF document text
    • http://pinogizege.rf.gd/dead_island_highly_compressed_free.pdfIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_ed22fa385134475bbed726721fa81b40.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/schwinn_bicycle_speedometer_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/40655265263.pdfIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_3cb61ee789e64bc29e2f1209febc8603.pdf?index=trueIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_7b1f0dfdeb1646ff942f9dc081886167.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujixus/powumejigepuden.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_6a1091cf39f64833bac13e47403e0316.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/avast_antivirus_zip_file_free.pdfIn PDF document text
    • http://wepirizifomonij.epizy.com/boy_scout_high_adventure_physical_form.pdfIn PDF document text
    • http://faderutapuviki.epizy.com/wilaletorenukumarelixu.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_55b944598f67400e95490a0b2db8e4a1.pdf?index=trueIn 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_off0000df0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0E 3548 bytes
SHA-256: 216edc6c90278a900b2c5940b11168d5c2988f34e21e6d9edb997a2611925bff
font_01_sfnt_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 5492 bytes
SHA-256: 810c0cf356b7abb8d8046f88a6a07f59778c511e1d0f58877e1b9fd1a290894f
font_02_sfnt_off0000fe8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 11000 bytes
SHA-256: 41ff6b34cdafac0109db581ecd5e3aa335f49af7303ddc79c77421178dcc6293