Malicious PDF — malware analysis report

Static analysis result for SHA-256 965c4e8a260a9900…

MALICIOUS

PDF

77.2 KB Created: 2021-03-09 19:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 31c8bc97f6f982e750c0c4d72d37a0b4 SHA-1: d640957f68e75689b6060c11fe7e4fd91d78a283 SHA-256: 965c4e8a260a9900c9bfe898f33345a9b3e4c546241d0e694cd0a72682eac77b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and is flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. The document body, though heavily corrupted, suggests a lure related to printer setup, directing users to a suspicious domain. The presence of numerous external links on disposable hosting further indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://dafemum.ru/strik?utm_term=how+to+connect+my+phone+to+hp+deskjet+2620 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383923/normal_602c72f5d40bd.pdfIn PDF document text
    • http://italywow.pro/blattformate_technische_zeichnungenhspy6.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/hdgvMgi/world_championship_2019_lol_song.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/idznkjb/weed_joint_photo_maker_editorial_board.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_5fe53f2266af7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370767/normal_5fe0b0dab0a1a.pdfIn PDF document text
    • https://jedijevabepepox.weebly.com/uploads/1/3/0/7/130739982/sigepi.pdfIn PDF document text
    • http://meetsucre.pro/samsung_front_loader_washer_and_dryer_lowesa27qx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_5fda850598383.pdfIn PDF document text
    • http://xsale.trade/sim_brothel_2_downloado82wh.pdfIn PDF document text
    • https://kerawidirara.weebly.com/uploads/1/3/4/7/134746453/1946127.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/jeihtih/jalezosuwinizopem.pdfIn PDF document text
    • http://salopkisa.website/how_to_use_photoshop_2020_after_trial_endscxv4s.pdfIn PDF document text
    • https://vewutuzukep.weebly.com/uploads/1/3/2/8/132815207/1330397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476930/normal_5fd1b82f61672.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/5hhlhzl/megovelolexonusug.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/sewawujo-dogom-nadejebiv.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://uploads.strikinglycdn.com/files/b638aef9-0b33-44ce-be4b-e65b8af418d2/53054216244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77060e5-a09a-4a00-a2d4-80f07cfa3f80/52937510064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002ea5a3-c0ba-4d81-bc8f-a9b388c517c4/kenmore_stove_igniter_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80dc8dd2-664b-4eb6-a62d-215a899833fa/75987899232.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_off0000e27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 5440 bytes
SHA-256: 95015ef5eeb6a8d1f2a4f6d8f20da6e5f24c9b21750fa6b7b7d9d19d343630fb
font_01_sfnt_off0000f4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EF 10492 bytes
SHA-256: c55bc644b172fee78a89d541ea6e92aeff84549c7b4fd90523d27d6591cd8fe6
font_02_sfnt_off000118d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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