Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f8ccb7677fd864d…

MALICIOUS

PDF

88.5 KB Created: 2021-04-19 20:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3ce9b5041cbc71ae8e75fa12b0183fc1 SHA-1: ab79d011dec5ccf5787c087c620c26e72e2d0a58 SHA-256: 1f8ccb7677fd864d780d5a94060e988a44bf230193982dfdf415926c7d0c607b
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 and redirector infrastructure, indicating a link farm designed to distribute malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL leading to known malicious infrastructure. While no scripts were directly extracted, the nature of the embedded links suggests a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crophysi.ru/strik?utm_term=pioneer+vsx-804rds+user+manual In PDF document text
    • https://cdn.sqhk.co/gosukutusu/mLBzvge/drum_kit_metal_fl_studio.pdfIn PDF document text
    • https://terajorekefiko.weebly.com/uploads/1/3/1/4/131408772/lujukadujabepadolef.pdfIn PDF document text
    • https://vonefemupeme.weebly.com/uploads/1/3/5/9/135957005/sugugobap.pdfIn PDF document text
    • https://bimomudunaxa.weebly.com/uploads/1/3/4/7/134757379/lunudugan.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/68e6e8d64980b38.pdfIn PDF document text
    • https://cdn.sqhk.co/wafasojudo/WoSigih/dogidaxobitulopekaxiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/gfgehjD/82612230618.pdfIn PDF document text
    • http://fevalugumaj.22web.org/tubikatamelezuraxor.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/6c135bbf-2602-4853-b42f-9a2f2c63a73a/66633514276.pdfIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_15952235e24745edb48c4628db5cb672.pdf?index=trueIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_75a8557fc08a41ae80fec18781c7a23b.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_22f185402c414de08b195d77f3da5afc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0592b01d-6e9a-4769-806f-afe2cd6d177f/matadimogubutam.pdfIn PDF document text
    • https://451cdc1f-766e-44a1-8a9d-f9db2ecad5ed.filesusr.com/ugd/0f0d48_f86358dc2e224e9cb6d283d99f63a82d.pdf?index=trueIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_8f0aeef847dd4216b85f0ce37840c391.pdf?index=trueIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_f16aacb1f9f74d638c0c62acccc854ce.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_2cb7bcec443549ae8f9be2783fb8460d.pdf?index=trueIn PDF document text
    • http://sitotozip.rf.gd/neumonia_nios_2020.pdfIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_743f3b9d370b4ab9984016721dc436ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32476ef9-48ed-4bd2-b7c5-846ef2d8f5bc/how_to_reset_moto_g5_to_factory_settings.pdfIn PDF document text
    • https://394fded3-a37f-45fe-8092-07e0884d2d31.filesusr.com/ugd/bdbc91_9743967af05d475a99cbeb032550c651.pdf?index=trueIn PDF document text
    • http://giduzorim.epizy.com/tamasha_full_movie_480p_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3953eda8-0dc9-424e-8a1a-15c0a0178d41/nofatesaxibuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3c8167-69c2-4b32-8361-3f7d01fe38cc/taurus_pt111_g2_sight_picture.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_off00011a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A89 5556 bytes
SHA-256: 1748750046f55ceebba97d1bd4be20edaff75f1de0209c2f7f5b249eaa9f1767
font_01_sfnt_off00012d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6E 11476 bytes
SHA-256: f447a0a6776a676d1b956919940e5de79e01e80c6c50e234f1dbbf67493e6981

Open this report in the interactive analyzer, or submit your own file for analysis.