Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29ebc4a8dca40f1…

MALICIOUS

PDF

78.7 KB Created: 2021-03-22 04:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f0ee6dc7d16884666ee1a8b7fafda39 SHA-1: 926d1ca0abbb768446312adccf9c07109e85572f SHA-256: d29ebc4a8dca40f1c2c0551ca79d174eaf3b285a792abc1fc777cae8e62a83d3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to unrelated or potentially malicious domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and extensive external linking are indicative of malicious activity designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=stardew+valley+first+summer+guide
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/2739336.pdf
    • https://cdn.sqhk.co/gavezexu/iaLjjgf/texas_holdem_poker_rules_for_beginners.pdf
    • http://lojasamericanasbr.com/99782031201s4zr.pdf
    • http://iceteas.space/the_end_of_the_world_skeeter_davis_lyrics_and_chordsafyew.pdf
    • https://cdn.sqhk.co/bamopilu/fiiJgjU/mindshift_backlight_26l_review.pdf
    • https://cdn.sqhk.co/gukitane/hgibdhf/radiant_energy_definition_simple.pdf
    • https://cdn.sqhk.co/remokuvupen/gHkOKjd/63924971774.pdf
    • https://cdn.sqhk.co/waduzebata/ovSji0S/avg_antivirus_crack_version_free.pdf
    • https://cdn.sqhk.co/debefuki/iahfifk/puppp_rash_postpartum_when_to_worry.pdf
    • http://particulieres-societegenerale.best/tusem_tm_tus_sorular43p51.pdf
    • https://cdn.sqhk.co/pavuraxutem/RLahh1x/hex_empire_2_free_online_games.pdf
    • https://xafozidej.weebly.com/uploads/1/3/4/6/134643925/mokejoxotela.pdf
    • https://cdn.sqhk.co/vedoreket/hmhbtge/the_closer_s_survival_guide_audiobook_free.pdf
    • https://zesakexe.weebly.com/uploads/1/3/5/3/135314388/9603231.pdf
    • https://vakugisup.weebly.com/uploads/1/3/0/7/130739558/linopibapowo.pdf
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/sibotufani.pdf
    • https://cdn.sqhk.co/wuzosiboweja/jgOjjMb/durarokamuladujototadu.pdf
    • https://cdn.sqhk.co/fexiseme/ihbvhdF/wefipiradutizev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/donake/autodesk_inventor_2014_keygen_crack_free.pdf
    • https://s3.amazonaws.com/lixuduwonifa/fipawemumef.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb11.bin
1206156973d0504c17527fcbc67c7b38ff6cbbed9ce30e7503bafd2c3cd350ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 5252 bytes
font_01_sfnt_off0000fd05.bin
3850a3216f87f498487684d4fe3bed93f7a3e0a9ee3aaa83699d34ca97262dd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 10056 bytes
font_02_sfnt_off00011f4c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 4324 bytes

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