Malicious PDF — malware analysis report

Static analysis result for SHA-256 934864df9eed2abe…

MALICIOUS

PDF

45.6 KB Created: 2020-04-02 09:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f8d4f3097716ba1664f04441a94f048f SHA-1: 6faad7bf48e43940e3f05200b8499c77e24afd0b SHA-256: 934864df9eed2abec5eeda3b7624d54328da8d0a5bc7d6c290bfc589a0fb0117
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files across different domains. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to act as a link farm, potentially for SEO manipulation or to distribute further malicious content through the linked PDFs.

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://elizabethbrophy.com/uploads/1/3/1/3/131384021/131384021.html#chapter+4+vocabulary+review+answer+key+biology
    • http://icook2culinarytrainingcenter.com/uploads/1/3/0/2/130271013/sujag.pdf
    • http://palmquistscience.com/uploads/1/3/0/5/130588206/7599513.pdf
    • http://bridgeportfamilypharmacy.com/uploads/1/3/0/2/130273584/nutekitiliv.pdf
    • http://revisnotes.com/uploads/1/3/0/4/130490643/8159184.pdf
    • http://homoubuntu.com/uploads/1/3/1/4/131406140/putigobosidoxer-pupeta-sorusodaneni.pdf
    • http://trikerrproperties.net/uploads/1/3/0/6/130639682/6c6c6f1bbba.pdf
    • http://a-loving-touch-florist.com/uploads/1/3/0/7/130776344/guwuvujezajuzal.pdf
    • http://veteranhillhops.com/uploads/1/3/0/8/130814190/gurojifejogus-bijowapurawula-gidojuvogaroli-sudikamow.pdf
    • http://midicicastlerock.com/uploads/1/3/0/6/130605152/vanugopewav.pdf
    • http://nuchabad.org/uploads/1/3/1/3/131380850/mugulewamase.pdf
    • http://centrumaero.com/uploads/1/3/0/5/130550803/nurave.pdf
    • http://onewsfrance.com/uploads/1/3/0/9/130969059/9213778.pdf
    • http://rharonharrisassociates.com/uploads/1/3/0/7/130776580/zuzopag.pdf
    • http://visionconstruction.org/uploads/1/3/0/5/130588443/d4d3eea2d21085.pdf
    • http://skydiversonly.com/uploads/1/3/0/4/130435902/faziritoke.pdf
    • http://reclaimingpeasant.net/uploads/1/3/0/9/130969066/6986560.pdf
    • http://anewsocietyfilm.com/uploads/1/3/1/4/131483468/xipisuneg-mesezagevoxifa-pubazewozu.pdf
    • http://mariliis.eu/uploads/1/3/0/6/130620928/1663062.pdf
    • http://salishman.com/uploads/1/3/0/7/130739726/96a36a215.pdf
    • http://rubymassagespa.com/uploads/1/3/0/2/130271087/lemis-divapolubuwe-remoxowuro.pdf
    • http://trumpopoly.com/uploads/1/3/0/5/130551249/juxezimolo.pdf
    • http://10210.org/uploads/1/3/0/9/130969758/fiwoguf.pdf
    • http://radicalartisticdesigns.com/uploads/1/3/0/6/130621916/revowowa.pdf
    • http://caredirectndissupportservice.com/uploads/1/3/1/0/131070330/8117709.pdf
    • http://caredirectndissup
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000881e.bin
50aee54c9c33d4c7de7bf11ee97eae2ae4a11a162517361f1ce2b57988f76790		 pdf-font-stream PDF embedded font (sfnt) at offset 0x881E 8452 bytes

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