Malicious PDF — malware analysis report

Static analysis result for SHA-256 384b957c67c02886…

MALICIOUS

PDF

40.3 KB Created: 2020-05-14 06:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f4cebc65b688e8f5a88df5cb4436d3fe SHA-1: ec983f2c1d04dc2b7cfe88406f0a565edabea26a SHA-256: 384b957c67c02886fcd4d9f7f01e289b202e056c1e925831c213b6f0dff50bd7
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the sheer volume of outbound links suggests a malicious intent to distribute or redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://agpmav.com/uploads/1/3/0/4/130476896/130476896.html#butterfly+stone+hd+wallpaper
    • http://waynebeitler.com/uploads/1/3/0/6/130604575/rovoze-magub-fozumaj-zebeluz.pdf
    • http://thecbd-place.com/uploads/1/3/0/2/130287413/4171399.pdf
    • http://goodlifeacademy.ch/uploads/1/3/0/7/130739144/nubifupowuzat_lawimilixunaxu.pdf
    • http://birdsbymail.com/uploads/1/3/0/3/130379504/1004153.pdf
    • http://businessfundingplus.net/uploads/1/3/0/7/130775214/d5fb432.pdf
    • http://lazymeal.app/uploads/1/3/0/5/130542875/vepuxu-gasoxisolabus-bewej.pdf
    • http://totalpackageessentials.com/uploads/1/3/1/1/131163712/752756131c40214.pdf
    • http://ballintoberphotos.com/uploads/1/3/0/7/130739773/nasavomiwidi_zigiruluwovode.pdf
    • http://frontrowsupply-sa.com/uploads/1/3/0/6/130620568/sivoraguzofopo_lidur_wokasukel.pdf
    • http://ecordeiro.net/uploads/1/3/1/0/131070998/wotitif_duvijexidam.pdf
    • http://succulentcreations.net/uploads/1/3/1/4/131453897/mufanubinodapi_jibufawe_xamunodilarunus.pdf
    • http://taylorstimelesstees.com/uploads/1/3/0/9/130969991/mizuve.pdf
    • http://dolledupbabe.com/uploads/1/3/0/5/130539843/dijexoribugutavase.pdf
    • http://zahkingbeats.com/uploads/1/3/0/5/130539842/98bb0.pdf
    • http://4one6team.com/uploads/1/3/1/8/131871993/kilozuv_milomugukamugar_tupogewugufek_wufowazajome.pdf
    • http://kcpetfair.com/uploads/1/3/0/8/130874161/galodu.pdf
    • http://rachelranieri.org/uploads/1/3/0/5/130590499/vameruxuniwo.pdf
    • http://alservicesallyourhouseneeds.com/uploads/1/3/1/4/131407235/5162975.pdf
    • http://hall-o-scream.com/uploads/1/3/0/4/130483733/vizofebupimavixego.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d80.bin
0b1a16d598d7b34890197cd23f55d81a1ba058db4652ce98fb00f701bf8ece5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D80 10052 bytes
font_01_sfnt_off00008032.bin
3f70697d8cfd0b9becff5adcad726f9ffedcc5d773cc6f7abbcc82b2f8034994
pdf-font-stream PDF embedded font (sfnt) at offset 0x8032 16164 bytes