Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e87f4762c941bd5…

MALICIOUS

PDF

41.2 KB Created: 2020-03-11 13:01:07 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5710faf5f76eed89ba94d0ceeeb4aa41 SHA-1: 8f323f55346379ad3de860bcd9737c98cfe16d7f SHA-256: 9e87f4762c941bd5cb3735de53204c94e794cf5fe7ee396858b1ea0a04085956
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many of which point to PDF files on various domains. This behavior is indicative of a link farm or SEO poisoning attack, designed to lure users to malicious content or to improve search engine rankings for malicious sites. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this intent. No scripts were extracted, and the document body is heavily garbled, making it difficult to ascertain a more specific purpose beyond link distribution.

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://yogalifesf.com/uploads/1/3/1/0/131070767/131070767.html#bergkristall+adalbert+stifter+analyse PDF link annotation
    • http://perfectsolutionsia.com/uploads/1/3/0/7/130739719/2849085.pdfIn PDF document text
    • http://mountainbik-ng.com/uploads/1/3/0/7/130739791/kajep.pdfIn PDF document text
    • http://nicorosch.com/uploads/1/3/0/4/130476859/690bf0e4ff.pdfIn PDF document text
    • http://kenicholson.com/uploads/1/3/0/7/130738524/7989fcc9a4.pdfIn PDF document text
    • http://ashlandeducationfund.org/uploads/1/3/0/4/130435771/7367384.pdfIn PDF document text
    • http://mail.fandangoshoppingbags.com/uploads/1/3/0/5/130551144/b58060e8.pdfIn PDF document text
    • http://petervazquez.org/uploads/1/3/0/8/130814861/fitewatibuto-xobiduwe-jojulodomo-xigetisepesowog.pdfIn PDF document text
    • http://www.lmaid.com/uploads/1/3/1/0/131070105/wuvafamaxenogetolaj.pdfIn PDF document text
    • http://hapaxcreativestrategies.com/uploads/1/3/0/6/130639091/818146c46.pdfIn PDF document text
    • http://homecarepreneur.com/uploads/1/3/0/9/130969993/8764482.pdfIn PDF document text
    • http://ttob-hotels.com/uploads/1/3/0/2/130288811/kejexili-xowexazelilela-mifewap.pdfIn PDF document text
    • http://orbitfiction.net/uploads/1/3/0/5/130551000/xujupewu-nokavefagasi.pdfIn PDF document text
    • http://hostmaster.camgaoanthy.com/uploads/1/3/0/8/130814009/tovudiba-jisiwovopilu.pdfIn PDF document text
    • http://petsaver.net/uploads/1/3/0/7/130776366/kabeponasoboxon_suloxemub_tefobidej.pdfIn PDF document text
    • http://feistyfighter.org/uploads/1/3/0/4/130490786/disumod_vigis_pikexunududeju_lubigorodod.pdfIn PDF document text
    • http://partystyleddc.com/uploads/1/3/0/4/130478831/sufudawubanoxiru.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
🗂 Part of campaign: acgr.info 4 samples

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000768c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768C 8564 bytes
SHA-256: 00948956453257091dc19bd5e52101caa2f1aeeb51a6d5eec3f278b262e4007c

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