Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b2aaa099b58dbf…

MALICIOUS

PDF

45.9 KB Created: 2020-04-04 08:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 49960fccdd890d6e0abbab04aaa9478f SHA-1: 627e1d231529f1f597013a71b10a90f238f0fcaa SHA-256: 84b2aaa099b58dbf839bffc45bc9b93e21530c997a6ad83741c30f0c1fc2c5e7
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF link farm, likely intended for SEO manipulation or to distribute further malicious content. The document body text is obfuscated and contains embedded URLs, suggesting it is part of a phishing or spam campaign. No scripts were extracted, but the presence of numerous external links and the ML classifier's high confidence indicate malicious intent.

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://datanetguatemala.com/uploads/1/3/0/8/130813649/130813649.html#ejercicios+de+fisica+resueltos+caida+libre PDF link annotation
    • http://thewisdomofshe.com/uploads/1/3/0/5/130588529/jososabizo-popovev-dawatalebepuwav-potajajokides.pdfIn PDF document text
    • http://skypixs.org/uploads/1/3/0/2/130291827/fc6923b9c.pdfIn PDF document text
    • http://gesegnet.org/uploads/1/3/0/5/130588461/913682.pdfIn PDF document text
    • http://wildoutsidersclub.com/uploads/1/3/1/4/131453657/dixowasup.pdfIn PDF document text
    • http://elementalembodiment.com/uploads/1/3/0/5/130539658/dubofumineri.pdfIn PDF document text
    • http://amsekeres.com/uploads/1/3/0/6/130604338/lenuwaxamoxun.pdfIn PDF document text
    • http://muazmee.com/uploads/1/3/0/2/130288684/1609034.pdfIn PDF document text
    • http://houseofpeacehouston.com/uploads/1/3/1/4/131438825/gikafaxajanitug_tanalixuf_woxodusafu_rojonafufezufa.pdfIn PDF document text
    • http://mydragonflyartsstudio.com/uploads/1/3/0/6/130604886/fabasatavuvej.pdfIn PDF document text
    • http://crossroadforangels.com/uploads/1/3/0/3/130313000/3c85d564f7d.pdfIn PDF document text
    • http://appcallservice.com/uploads/1/3/1/0/131070611/wokakamu_saluk_sopiwese_dorivosuf.pdfIn PDF document text
    • http://graydonconstruction.org/uploads/1/3/0/2/130287548/4141131.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BED 6444 bytes
SHA-256: 1957428794578a072b8983e864e5701b52391162abfb2d6d14c6295fa8a16687
font_01_sfnt_off00007baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAF 8280 bytes
SHA-256: 2971c53024f2f9b747d093d1c8c10405467790650ff7d0cc66a7132a4251c1a3
font_02_sfnt_off00009a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A11 3704 bytes
SHA-256: f654d4792efdf15ab94b20e642e192a81e8a9426c77aef1608673460db686204

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