Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a9f06c1a0f35b1…

MALICIOUS

PDF

39.0 KB Created: 2020-04-02 10:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1de22cd6cd4e4090390e9fdfcbc36088 SHA-1: c90525a763af7e20adcacc1712eaca6b963eecc9 SHA-256: b3a9f06c1a0f35b1901426f0ef1ad7c100954c4c19679d2f9e604a7d2c8c2094
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, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains references to the URLs, reinforcing the link-farming attack pattern. No scripts were extracted, but the sheer volume of outbound links suggests a drive-by download or phishing attempt.

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://robertshrigleywoolf.com/uploads/1/3/1/3/131383588/131383588.html#caracteristicas+acero+inoxidable+304
    • http://waynecountysporting.com/uploads/1/3/0/5/130542729/zogikexunululi.pdf
    • http://biotanks.net/uploads/1/3/0/7/130775427/semetefufev.pdf
    • http://lmlong.org/uploads/1/3/0/6/130639853/3e92f074f20.pdf
    • http://dokholidayresort.com/uploads/1/3/1/3/131380754/4c3029d755200.pdf
    • http://electivesharereform.org/uploads/1/3/0/8/130873860/13c2e45343.pdf
    • http://bobcranephd.info/uploads/1/3/0/6/130639656/9776afd3.pdf
    • http://khourybros.info/uploads/1/3/0/6/130621109/5250042.pdf
    • http://lilacsjoyandgrace.com/uploads/1/3/1/3/131379392/webipixovibepev.pdf
    • http://couponcoloradofortcollins.com/uploads/1/3/0/4/130483109/d19cd56b7.pdf
    • http://banquedopportunitesinvest.org/uploads/1/3/0/8/130813779/d192c1d0fa42a6.pdf
    • http://deltaconstrucoes.com/uploads/1/3/1/0/131071145/8742692.pdf
    • http://uchoosedrycleaning.com/uploads/1/3/0/4/130488312/7df672b.pdf
    • http://ltcsoftball.org/uploads/1/3/0/7/130740033/78ea2106e761.pdf
    • http://grayscaleconstruction.com/uploads/1/3/1/1/131164358/e3f14.pdf
    • http://grizzlycreekhomeservices.com/uploads/1/3/0/5/130589238/281ebb.pdf
    • http://melissaandbastian.com/uploads/1/3/0/4/130435819/rorasedepow.pdf
    • http://futurestake.net/uploads/1/3/0/5/130550800/4d0ef53eccdfb6.pdf
    • http://motorshoweast.com/uploads/1/3/1/3/131379591/9438810.pdf
    • http://www.latinosandtech.berkeley.edu/uploads/1/3/1/3/131379054/5d5d8e.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_off00006f8c.bin
141ce77aa340cb46185d025c2e91406f17e75693026fbf79fd460337127ad82c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8C 8016 bytes

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