Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2a1ff654c2fae4…

MALICIOUS

PDF

85.9 KB Created: 2021-02-22 18:39:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0236132bc2a85b3b392d33bee815bf3a SHA-1: e0d579e908e31ee68c698034d27ec41d48d5ec62 SHA-256: dd2a1ff654c2fae48de39f095adefc4f6fe110c8baab644c8fb4ae384a4e4a66
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a network of disposable domains, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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/wb?keyword=flysky%20fs-i6%20telemetry In PDF document text
    • http://sifulodidikit.22web.org/chamma_chamma_new_video_song_1080p.pdfIn PDF document text
    • http://revinulamuxawa.22web.org/warhammer_2ed_almanach_mistrza_gry.pdfIn PDF document text
    • http://5coupons.info/which_trigonometric_functions_have_asymptotesnmh5y.pdfIn PDF document text
    • http://roworesezakor.iblogger.org/marshall_rosenberg_nonviolent_communication_quotes.pdfIn PDF document text
    • http://kernig.store/ranenuwujopuvamufuno6z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://midowuvebadol.rf.gd/94025863008.pdfIn PDF document text
    • http://gopikobupi.epizy.com/beautiful_rose_hd_pictures.pdfIn PDF document text
    • http://pufasetidovido.epizy.com/48418765774.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/minecraft_bed_wars_mod.pdfIn PDF document text
    • http://sikofus.epizy.com/wastewater_recycling_methods.pdfIn PDF document text
    • http://vusevupitiwo.rf.gd/mopifafumajujitiwonelo.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/emulate_android_phone_on_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/best_cycling_news_app_android.pdfIn PDF document text
    • http://womejus.rf.gd/30054231621.pdfIn PDF document text
    • http://putojeferef.rf.gd/34007500385.pdfIn PDF document text
    • http://sulowufesesikep.epizy.com/voxotutiforijumedezixe.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_off0000fc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 6860 bytes
SHA-256: a5bdca58c2e2efa6144bb7dc53dfff7770ea2d1b2971776dd09de2f15035687a
font_01_sfnt_off00011358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11358 5008 bytes
SHA-256: 5c7d9ff7e5ee6591be6dd44a071d3109e33ea6a0f53eb45d829cd7d372419b2f
font_02_sfnt_off00012467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12467 11248 bytes
SHA-256: 42c0c780d828619ac63aafca80c0fd0b8c25101ad2f37eddc2a8828d1a7f1af7