Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fae5b9d8e5e0f6…

MALICIOUS

PDF

83.0 KB Created: 2021-04-24 16:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5c5707f6e8f5d0a40d74d500ee5b074b SHA-1: 2eddfdb4b66ccab22b6b1764aca91ecdc56c1e90 SHA-256: 95fae5b9d8e5e0f67941d9fc107990090cfbd1f2bc30fea8d8953d376f49756b
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting or redirectors, indicating a link farm designed to direct users to malicious sites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML flagging further supports a malicious classification. The document body, though heavily obfuscated, contains text related to gaming headsets and appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+connect+my+afterglow+headset+to+ps4 In PDF document text
    • https://mixunolonuwoja.weebly.com/uploads/1/3/0/9/130969204/guwigid-wukidi-binifurabudakej-zosikenik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505820/normal_5ff5e3fb6a023.pdfIn PDF document text
    • https://jebowevut.weebly.com/uploads/1/3/4/4/134493782/gobajitosopef.pdfIn PDF document text
    • http://50offshop.pro/bpsc.bih.nic.in_admit_card_2019_downloadpbv0v.pdfIn PDF document text
    • http://beautysss.site/10502547530u648u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393180/normal_6059be87a9948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5fe77cf2350ed.pdfIn PDF document text
    • http://cosmicgig.com/mivofefofozetibijititugoim0x.pdfIn PDF document text
    • https://xowonijateroz.weebly.com/uploads/1/3/1/3/131380337/tofekat.pdfIn PDF document text
    • http://wordsidepost.top/38224022355x69q3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476007/normal_604ba0d893827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424646/normal_6041e47f64a57.pdfIn PDF document text
    • https://radofagomomixa.weebly.com/uploads/1/3/4/1/134132329/kijivevatep_lodeduwejisil_zavixinagozos.pdfIn PDF document text
    • http://subbellassecret.com/sodastream_refill_price_big_wqxl1l.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/b2360a23-1c52-4df8-ac3a-fe6b7e0febf0/puwidexababo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7898bdab-9c45-499f-81e1-416a38decf92/2495600482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079d3f93-ad91-44d9-9fbb-060766f272b9/yahtzee_score_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7a06e2-52e5-4348-bd0a-4bb003f6afff/in_a_dark_dark_room_and_other_scary_stories_free.pdfIn PDF document text
    • http://sajutab.rf.gd/netoxofijutaj.pdfIn PDF document text
    • http://nenidexixod.epizy.com/29563462651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7188cf-960c-4df6-a576-a64ffa54d55f/11_day_diet_menu_samples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666a3fc0-7d17-4d38-8189-0e7ba97223d6/dizurukage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9147237f-df28-4225-9dca-b181eb6dc836/how_to_download_audio_output_device_for_windows_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d558be-31e8-4a17-a5a0-99c44ad1b5cb/asus_rt_n12_d1_configuration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a74292f-c4d6-4707-8467-063af8789e6a/91994629721.pdfIn PDF document text
    • http://pepagulax.epizy.com/pefemepozu.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_off00010501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10501 5812 bytes
SHA-256: 28e75e089e58a6ba4cca6bcf0b02fd8b6e92820f2dae369214ab0bdd1e27efd5
font_01_sfnt_off000118c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C2 10920 bytes
SHA-256: 987773b5446f9ea9c4413926f9872a8d7d4f6c3c0f77f4b20ac57878d54f232f