Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15122947d1fd35c…

MALICIOUS

PDF

85.6 KB Created: 2020-03-20 10:26:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e03682b5f49a56454e23ef781d390186 SHA-1: efde013f647f961b112b50530f939469f1d53d6f SHA-256: a15122947d1fd35cde6d8f4e63bb07e302e0989c8ba47accfc39f6f3d91ade3e
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains text that appears to be a lure, possibly related to news or SEO content, directing users to the embedded URLs. The primary attack pattern involves redirecting users to a network of sites, likely for malicious purposes such as hosting further malware or engaging in SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ziteksolutions.com/uploads/1/3/0/7/130740133/130740133.html#daily+thanthi+newspaper+tamil+today
    • http://bitsofyourbeing.com/uploads/1/3/0/3/130379814/62005e2.pdf
    • http://www.spraytandc.net/uploads/1/3/0/4/130489081/7118283.pdf
    • http://grantcanyonoilandgas.com/uploads/1/3/0/4/130488512/gopolakironenosiba.pdf
    • http://kitchengadgetsreviews.net/uploads/1/3/0/4/130490719/darofuwese.pdf
    • http://annabellaofbowwowwow.com/uploads/1/3/0/9/130969037/kadajopevi.pdf
    • http://juanodeonphoto.com/uploads/1/3/0/7/130776458/e9dbc91.pdf
    • http://blackandwhitewithadashofred.com/uploads/1/3/0/5/130590371/6055310.pdf
    • http://reporting-child-abuse.com/uploads/1/3/0/8/130874213/0d3a075562c.pdf
    • http://mr-squeegee.com/uploads/1/3/0/5/130589345/6631435.pdf
    • http://sshhitsournls.com/uploads/1/3/0/4/130483236/nivelibobojekopubizi.pdf
    • http://moniqueyin.com/uploads/1/3/0/7/130738845/1385717.pdf
    • http://www.headlocks.net/uploads/1/3/0/5/130543538/78d8fae5.pdf
    • http://elliesinclair.com/uploads/1/3/0/7/130776350/pewonolakemesa.pdf
    • http://emersoncurtisbradford.com/uploads/1/3/0/5/130551214/ddf210506.pdf
    • http://dentistaparacachorro.com/uploads/1/3/0/7/130776791/wewalabu.pdf
    • http://bryankingartist.com/uploads/1/3/0/6/130621306/6721006.pdf
    • http://powernetgainesville.com/uploads/1/3/0/2/130274109/gixono.pdf
    • http://changeyournamekit.com/uploads/1/3/0/7/130740556/6574648.pdf
    • http://erjica.site/uploads/1/3/0/6/130604928/mukolawefewaxit_vovewi.pdf
    • http://betterby10.com/uploads/1/3/0/9/130969663/1486612.pdf
    • http://goldenlady18k.com/uploads/1/3/0/6/130639757/jobowixoxo.pdf
    • http://www.pettygangseven16.com/uploads/1/3/0/9/130969525/povamagajaw.pdf
    • http://avatar3dpornpictures.porncolection.com/uploads/1/3/0/2/130289377/doredo_jobosu_sinalobomezuguj_folobis.pdf
    • http://pbmdentallasers.com/uploads/1/3/0/2/130274199/xiluj_sulaxo_mixefo.pdf
    • http://pbmdentallasers.com/uploads/1/3/0/2/130274199/xiluj_sulaxo
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caf6.bin
e65c799ffeefabc60d3227417df153124cc3eae4e1e4ce2e2f7a7ce182d8dd9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF6 27196 bytes
font_01_sfnt_off0001149c.bin
3c161df21b11729dcbe022159d134e5c83de7fe1ebd694a3fe7e40ecef410749		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1149C 7696 bytes
font_02_sfnt_off000132a9.bin
1a48559509f7f75063a877bee3d72c2f3225c728dd953cebf65f9a5167f6cbd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132A9 16036 bytes

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