Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0cda913a616e52b…

MALICIOUS

PDF

48.7 KB Created: 2020-03-08 11:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e9ea4be964063d73f9d69ab4c7b822eb SHA-1: e42d40eabe216493e09d3319aad61c85ea64521e SHA-256: c0cda913a616e52b88d7d154fff35653471e6d345fea6e2e2af80947e08e6e8d
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many pointing to other PDF files hosted on various domains, indicating a link farm or distribution network. The primary attack pattern involves luring users to click on these links, potentially leading to further malicious content or exploitation. No scripts were extracted, but the sheer volume of external links suggests a high likelihood of 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://tiantianboshishicai.br3h.com/uploads/1/3/0/2/130289630/130289630.html#alienware+17+r4+17.3+gaming+laptop+%28512gb%29+review
    • http://danoboots.com/uploads/1/3/0/3/130379769/lomikivabi.pdf
    • http://juliesfrenchpastries.com/uploads/1/3/0/7/130775220/waxulirapo.pdf
    • http://www.misseynonre.com/uploads/1/3/0/7/130739450/fefb69e09.pdf
    • http://zofe.fr/uploads/1/3/0/7/130740187/rifuvawazip.pdf
    • http://evoaccounting.org/uploads/1/3/0/6/130620985/lajufepitazi-xedowi.pdf
    • http://www.secret-estate.com/uploads/1/3/0/8/130814020/39dfbb62.pdf
    • http://www.kawtoskifitness.com/uploads/1/3/0/8/130814596/b458c41559.pdf
    • http://jeremihagelin.com/uploads/1/3/0/4/130478123/ac5192.pdf
    • http://tamagucci.shop/uploads/1/3/0/5/130589151/ca40fbbb.pdf
    • http://www.royerfarm.com/uploads/1/3/0/5/130543084/2272477.pdf
    • http://designpreviewer.com/uploads/1/3/0/6/130639683/e37652199.pdf
    • http://ilovesano.com/uploads/1/3/0/2/130270753/d9d1d.pdf
    • http://mx.scotthill.org/uploads/1/3/0/4/130488243/rivelakusopulo.pdf
    • http://www.jj-weaver-accessories.com/uploads/1/3/0/6/130620594/87e6e2c4b79df48.pdf
    • http://tasmanianpolarnetwork.com/uploads/1/3/0/7/130739845/fewevive-zuviker-zefasasixodaboj-roredavadivol.pdf
    • http://fightographer.com/uploads/1/3/0/6/130639183/duzozeviwo-ruvew.pdf
    • http://xayavathco.com/uploads/1/3/0/7/130776760/mosuwupuzi-kiteniteji-metuzabu-litali.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000966c.bin
eee0f1dc32d5696157bce095996acbd6317179170d46638f1c66dfe1bf719590
pdf-font-stream PDF embedded font (sfnt) at offset 0x966C 7828 bytes