Malicious PDF — malware analysis report

Static analysis result for SHA-256 a182d0fc81ad8c5e…

MALICIOUS

PDF

110.9 KB Created: 2021-03-08 06:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2173e544f1b65d1ce8ec5ca9d835fc6d SHA-1: d59e85022d0ee862a0120dc5ecb3991cd8f7333f SHA-256: a182d0fc81ad8c5ed4868e094095dbbcbeb19aed93b06fbbefc7b202a05be5b3
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains metadata related to 'Secrets of the baby whisperer summary' and references wkhtmltopdf, indicating it's likely a lure to drive traffic to malicious or spam sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://fokemale.ru/strik?utm_term=secrets+of+the+baby+whisperer+summary PDF link annotation
    • http://bonboxstudio.com/30702382404xm1ju.pdfIn PDF document text
    • https://kogevinipuban.weebly.com/uploads/1/3/4/5/134514077/5256363.pdfIn PDF document text
    • http://raftgjgr.space/2112711109194uyg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393521/normal_600898e99ec5f.pdfIn PDF document text
    • https://lixagomifele.weebly.com/uploads/1/3/5/3/135323016/keviratodobedatul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_6045651fdf1aa.pdfIn PDF document text
    • http://pagebake.com/characters_in_troilus_and_cressidanucan.pdfIn PDF document text
    • https://lariwajiko.weebly.com/uploads/1/3/4/3/134316624/1458303.pdfIn PDF document text
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/21d659e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448556/normal_5fdfa3fb052cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d98fc3-272a-4ad6-89f4-e2790128430d/vababomoximumenano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e3ac24b-9022-43a3-b330-10772bc91f72/why_is_my_samsung_microwave_not_heating_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe75a49a-1c2b-4f80-9874-eb4a238637c4/dowobemodulidajewagi.pdfIn PDF document text
    • http://balubusepebibi.rf.gd/h2o_mop_x5_elite_how_to_use.pdfIn PDF document text
    • http://koselogajigikev.epizy.com/dell_latitude_e6410_laptop_widescreen_i5_4gb_ram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4cde2a-9dcd-4f89-9cd1-4810cd5c95ba/tree_of_life_movie_ending.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f2645e1-bd7c-4118-9d3a-7f9b836c435e/59594665182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec2f494-a946-4350-ae0a-f5b635ede50c/bakodisoj.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_off00017114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17114 5660 bytes
SHA-256: d04e8bd22e75d53e202c56bab5875a10f923b608136f3b9ae92b469cad956e45
font_01_sfnt_off00018448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18448 13364 bytes
SHA-256: 8e9d832f30175f1e3113ea379dea00e4f65af31627cf2f21faf85f742efe62b3

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